Dry weather fears of Britain’s early ‘industrial’ canal network
The first large-scale water supply in Britain was not for potable domestic supplies, but for the canal network, the arteries of the industrial revolution. This paper examines how episodes of dry weather in the late eighteenth and early nineteenth centuries, reconstructed from early instrumental sources, impacted the developing canal network. Analysis reveals how a frequent lack of preparedness for even relatively minor drought events resulted in conflict between water users, with potentially serious socio-economic consequences. The economic pressure of compensating other users for loss or reduction of their water supply resulted in canal companies investing in technologies and management techniques that continue to be used today as drought mitigation strategies, such as the building of large-capacity reservoirs and groundwater abstraction. This period represents a key technological milestone in the development of the modern water supply systems, contextualising current challenges faced by the water industry in responding to drought events. Although the failure of the British canal system no longer has serious economic impacts, themes emerge from this research which are as relevant for water supplies today as they were in the eighteenth century, such as issues around water rights and the value of preparing for potential future extreme weather scenarios. A newly reconstructed composite precipitation series for Chatsworth House is presented (1760–present). Through comparing weather records within the archives of canal companies and their competitors for water supplies, historical insight can be gained into the possible far-reaching societal impacts of drought.
KeywordsDrought Canals History Reconstruction Water management UK
Droughts are complex events that can be spatially extensive or regionally focused (Todd et al. 2013). Large-scale droughts are a recurrent feature of European climate (Spinoni et al. 2015), with notable British droughts in 1975–76 (Rodda and Marsh 2011; Zaidman et al. 2002), 1995–96 and 2003 (Fink et al. 2004) and recent droughts such as 2010–12 (Lennard et al. 2014) highlighting the Britain’s vulnerability. However, these droughts are not unique or exceptional, with a long history of droughts impacting on European and British climatic history (Spraggs et al. 2015). The wide-scale megadrought of 1540 is well documented across Europe (Wetter et al. 2014) but caused limited impact in Britain, whilst the ‘long drought’ (1880–1910) as documented by Marsh et al. (2007) highlights that droughts may be a single event or a series of events in close succession. Whilst much of the analysis of past droughts has focused on drought reconstruction (Brázdil et al. 2018, 2013, 2008), increasingly past droughts are being viewed relative to other drought indicators, for example, water resource management (Lennard et al. 2015; Lennard et al. 2014) and hydrological drought (Jones and Lister 1998).
Definitions of droughts are frequently characterised within five inter-related categories: meteorological, hydrological, agricultural and socio-economic drought (Wilhite and Glantz 1985), with groundwater drought added by Mishra and Singh (2010). Droughts usually begin following a prolonged period of widespread moisture deficiency (Palmer 1965) and propagate through the hydrological cycle (Van Lanen 2006), exhibiting differing spatial and temporal characteristics depending on a variety of factors. Droughts are often defined as dry periods relative to climatic norms and occur even in climates where normal conditions are relatively wet (Namias 1981). They are not only geophysical events but are also socially constructed, with societal structures affecting impacts and perceptions of drought (Endfield et al. 2004; Olivier-Smith and Hoffman 1999). Recent work has highlighted the importance of considering people when developing an understanding of contemporary drought (Van Loon et al. 2016a, 2016b); however, this can also be extended into the past. Drought in Britain before the industrial revolution caused fires, disease, mortality (human and animal) and crop failures (Stone 2014, p. 437), but as industrialisation took hold, the impacts became more connected to the availability and quality of water for industry, transport and drinking.
The first large-scale water supply systems in Britain provided water not for domestic or industrial use but for the canal network, the arteries of the industrial revolution. Analysis of the impact of dry weather on water supply networks has predominantly focussed on the supply of potable water in urban areas (Van Lieshout 2016; Taylor et al. 2009; Waddington 2017). Little attention has been paid to the role of canals and the significance of the development and expansion of the early canal network, particularly the role of reservoirs. The systems supplying canals generally predate large-scale potable water supplies, which were in their infancy when the water supply systems for canals were established. During the eighteenth and early nineteenth centuries, water for towns was rarely transported more than a few kilometres (Van Lieshout 2016; Porter 1978; Taylor et al. 2009). Taps inside houses were a luxury, and water was seldom stored in sufficient quantities to provide supply during droughts (Hassan 1985). Canal water supply systems were the first to regularly transport water long distances in Britain and to establish large-scale water storage systems as a result of drought and competition for water. The builders of late eighteenth century canals negotiated rights to water, which later informed how commercial water companies managed their supplies. By responding to water shortages, they laid the groundwork for modern water supply resilience.
This paper explores the dry weather fears of Britain’s early industrial canal network through the impact of droughts on canal operation in the late eighteenth century. It presents a previously unpublished long instrumental precipitation reconstruction for Chatsworth in Derbyshire and demonstrates the impact of droughts on the development of canal infrastructure, particularly the nearby Trent and Mersey Canal. It argues that the development of the canal network, which was driven in part by responses to drought, was an important phase in the development of water supply systems in Britain, which has previously been overlooked.
In exploring how the early canal network developed and its vulnerability to droughts, this paper also contributes to the growing literature exploring how past experiences can, and continue to, shape our understanding of contemporary climate (Adamson 2015; Adamson et al. 2018; Mitchell 2011; Westermann and Rohr 2015) and hazard adaptation and resilience (Jones et al. 2012; Sangster et al. 2018).
The development of canals in the eighteenth and nineteenth centuries
Movement and transport of water for irrigation and communities has been a feature of the water landscape since early settlements (Middle East c. 5000 BC), but these systems often remained relatively simple in structure and scale (Bazza 2007). In Britain, transporting heavy and bulky goods by water has been undertaken for many centuries (Blair 2014; Gardiner 2017). The early industrial canal network expanded and improved on an earlier system of natural and engineered navigable rivers, supplemented by some artificial channels (Bond 2014). These river navigations were subject to seasonal variation in flow and liable to the movement of sediments during periods of high flow, which could easily render the channel unnavigable (Satchell 2017). The modification of river channels to allow for easier navigation only provided short term improvements; widening, deepening or reducing sinuosity often increased the water velocity and concurrently increased erosion rates and downstream silting (Rhodes 2014). As Thomas Telford (1757–1834), the notable civil engineer, remarked in 1800, ‘artificial canals have been formed in many parts of the country, and the navigation of many of the other rivers in this island have been greatly improved; yet still the navigation of the river Severn has been suffered to remain in its natural and imperfect state; not one obstacle has been removed, nor has one improvement been yet introduced’. One of the causes of the ‘imperfect state of the navigation’ was ‘the deficiency of water in drought, and from the superabundance of it during rainy seasons’ (Plymley 1803, p. 286). These navigable rivers were unpredictable and uncontrollable; the canals of the early industrial age attempted to improve upon them by taming and redirecting nature. Water was captured and controlled in slow-moving and relatively straight channels of predetermined dimensions, thereby significantly reducing problems caused by sediment movement. However, these characteristics could themselves present problems of sedimentation where water sources introduced sediments to the canal network.
In the second half of the eighteenth century, many long-distance canals were constructed. Travel by water was susceptible to extreme weather, with major disruptions caused by dry, wet and cold weather recorded (Freeman 1980; Satchell 2017). The earliest industrial canals, like the river navigations before them, mostly sourced their water from streams and rivers along their length, although sometimes supplemented with water drained or pumped from mines (Boughey and Hadfield 1994, p. 47; Hadfield 1969, p. 20). As a result, the supply of water to these canals was sometimes no more reliable than the supply of water to river navigations, with canals frequently suffering from water shortages and freezing (Freeman 1980). The early canal builders did not greatly innovate when establishing the water supplies to their canals; consequently, their canals were often vulnerable to water shortages. As the number of canals increased, the amount of stream and river water available to new enterprises decreased. Acts of Parliament concerning canals became increasingly prescriptive about the use of surface water. Clauses giving rights to take flood or rainwater or to compel mine owners to raise water pumped out of their mines to a level at which it could be discharged into the canal were widely adopted. While the Duke of Bridgewater’s Canal (the first industrial canal, opened 1761) Acts (32 George II, c. 2, 33 George II, c. 2, 2 George III, c. 11) contained only a few sentences about water supply, by the 1790s, multiple paragraphs described the rights and the restrictions on using water (see for example the Rochdale Canal, 34 Geo III c. 78 or Newcastle(-under-Lyme) Canal, 35 George III, c. 87).
The long-distance canals of the industrial age faced additional water supply challenges compared with river navigations, as they crossed watersheds, where water was naturally in short supply. Some, relatively small, reservoirs were built at the same time as the early canals, to regulate the supply of water to these difficult to supply summit sections. Although bigger than the average mill pond, these reservoirs operated in a similar way, allowing canal companies to (in the words of the standard clause of the earliest canal acts regarding reservoirs) ‘more conveniently’ supply their canals and locks with water. These reservoirs regulated the flow on a daily and weekly scale but did not store sufficient water for use during longer periods of dry weather.
Canals, therefore, as arguably the largest water users in early industrial Britain, faced some of the most severe drought impacts in this period. Much can be learned about canals and the effects of extreme weather in the late eighteenth and early nineteenth centuries by examining the archival material relating to canals alongside historical weather data. Many of the canal company archives are located within local and regional archives and The National Archives (TNA) in Kew. An initial archival search for documents relating to water shortages on canals was undertaken at the Staffordshire Record Office (SRO), which resulted in the discovery of a substantial amount of material in the Sutherland Estate Collection, including correspondence with the Clerk of the Trent and Mersey Canal Company (SRO D593/L/1/14) and Acts of Parliament and related material (SRO D593/V/3/29). Other relevant material at the SRO included letters sent by Samuel Barnett and Company (tin manufacturers in Kings Bromley) between 1796 and 1803 (SRO 6702/1) and the Staffordshire Quarter Sessions records (SRO Q/SB 1810 T/466). The company archive of the Trent and Mersey Canal Company does not survive intact, though some records, which for the eighteenth century are mainly financial, are stored at the TNA (RAIL 878). The archive of the neighbouring Staffordshire and Worcestershire Canal Company, however, survives, split between the SRO and the TNA. The minutes of the half-yearly meetings of the Staffordshire and Worcester Canal Company 1766–1845 were read (SRO D3186/1/1/1) alongside surviving committee order books 1766–1785 and 1803–1804 (TNA RAIL 871/1, RAIL 871/2). Letters written between 1797 and 1801, preserved in the letter book of civil engineer John Rennie (1761–1821), were another key archival source (ICE REN/RB/02). The TEMPEST database was searched for corroboratory archival evidence (Veale et al. 2017). In order to complement the rainfall series from Chatsworth, the material selected for this paper relates mostly to the Trent and Mersey Canal, although impacts were felt across the country and canals elsewhere faced similar problems.
The Trent and Mersey Canal was authorised by Act of Parliament in 1766 (6 Geo III c.97), and its construction was finished in 1777. Its summit level, which was the most difficult to supply with water, is on the border between the counties of Cheshire and Staffordshire. This summit level is ~ 34 km from Chatsworth House, where, as this paper will detail, a long instrumental precipitation series has been reconstructed, with monthly homogenized rainfall series from 1777 (when the Trent and Mersey Canal fully opened) to the present day. The reconstructed precipitation series for Chatsworth provides a new long series, which is likely to be a representative of the rainfall at the summit of the Trent and Mersey Canal, since comparison with non-instrumental records from Trentham, near Stoke-on-Trent, several kilometres the other side of the summit of the canal show similar precipitation patterns.
Chatsworth house precipitation reconstruction
Sources of data for the reconstruction of the Chatsworth rainfall series
Met office ten-year books
Annual totals only
Annual totals, some monthly values quoted in the text.
Met office ten-year books. Data extracted from the Memoirs of the Literary and Philosophical Society Manchester (Garnett 1793)
Lord George Cavendish
Monthly and annual totals
Met office ten-year books
Lord George Cavendish
Annual totals only
Met office ten-year books
Monthly and annual totals
Met office ten-year books
Monthly and annual totals
Met office ten-year books
Monthly and annual totals. Jan–Mar 1860 missing and no annual total for 1860
Chatsworth register of Rainfall, House archive
Monthly and annual totals
BADC: digitised from 1878
Station ID 544, missing data includes 1882, 1883,1884, 1886, 1924, Mar–Dec 1976, Jun 1984, Sep 1984, Jan 1985, Feb 1988, Dec 1997, Aug 2001, Jan, Feb 2002, Aug–Dec 2002, Sep 2005, Nov–Dec 2012. Single missing months infilled with interpolation. Pre-1925 years filled with digitised archive photographs. More recent missing months infilled via linear regression with BADC station 552.
Farley (1811), a geologist and surveyor, argued that weather registers, such as that kept at Chatsworth, would ‘in time prove of the greatest importance, as the foundation of a Science of Meteorology’ (p.103). The value of such series is increasingly being recognized in not only helping to understand long-term climate variability, but also providing a better understanding of extreme event frequency (Sangster et al. 2018). The rain gauge at Chatsworth House was monitored by the gardener, who maintained meticulous notes on the weather conditions, with abstracts published in scientific accounts of the period, including, the Memoirs and Proceedings of the Manchester Literary and Philosophical Society (Supporting Online Material Fig. 1). As with the promotion of new farming practices at the time, improvements in estate management and the construction of farm buildings, the recording of weather data was often pioneered at large estates like Chatsworth (Jankovic 2000). The recording of early instrumental meteorological data, such as barometric pressure, temperature, rainfall, wind direction and strength provides valuable quantitative data as to the nature of the weather and climate in the past and can be used to help recover local climate histories (Strauss and Orlove 2003).
Precipitation series reconstruction, homogenisation and homogeneity testing
A number of components of precipitation record are used in reconstructing the Chatsworth House series, 1760 to present. Three primary series are used in the composite reconstruction, the series of monthly and annual data at Chatsworth House (1760–1810), the series from Welbeck Abbey (1806–1878) constructed by Craddock (unpublished) and the series from Chatsworth House that is continued to present (1860–present). The greatest uncertainties are likely to be with the early Chatsworth series, as meteorological instruments were not consistently used nor designed. Consistency in siting of meteorological instruments closely relates to the development of the British Rainfall organisation (1860–present) in Britain and the pioneering work of G. J. Symons (Pedgley 2002), as such early instruments were often attached to walls or in poorly selected locations, resulting in erroneous data.
To extend the earliest part of the record (part A; 1760–1810), linear regression analysis was performed using annual data from Chatsworth House and monthly and annual data from Manchester (~ 50 km away) for the overlapping period 1786–1800. A good relationship exists between annual precipitation (R2 = 0.7) and monthly (R2 = 0.54) totals, with monthly data adjusted to ensure comparability to the earlier Chatsworth House series. The period 1810–1860 was infilled at Chatsworth using monthly data for Welbeck Abbey; the regression equation (using overlapping data 1860–1878; R2 = 0.59) was used to adjust data from Welbeck Abbey to ensure comparability with data observed at Chatsworth House and to construct the second part (B) of the homogenous record: 1810–1860. Existing transcribed data for Chatsworth House (1860–present) was downloaded from the British Atmospheric Data Centre (BADC; Met Office 2018) and checked against the original records from Chatsworth House, with gaps in the transcribed series infilled from the original records. The two sections A and B are then adjusted to the Chatsworth House series (1860–present), part C.
Drought and canals
During the 1770–90s, the British canal networks were in their infancy, lacking large reservoirs to compensate for dry weather. As a result of insufficient water supplies, canals lacked resilience. Dry weather often resulted in water shortages; a series of notable droughts arising during this early period of canal development impacts both the canals, but also England more widely. In both 6- and 12-month SPI series for Chatsworth, the year 1785 stands out as a particularly severe drought, with peak severity occurring in May 1785 (− 4.39) and July 1785 (− 3.72) in the 6- and 12-month SPIs respectively. Corroboratory archival evidence supports this, with several accounts in the TEMPEST database (Veale et al. 2017) documenting the impacts of the severe drought of 1785 regionally and nationally. Estate correspondence from Husbands Bosworth in Leicestershire (~ 90 km to the south), talks of the ‘calamitous season’, with land agents (estate managers) writing in July 1785 noting that ‘by reason of an extraordinary drought, the graziers are in the greatest distress’ (LLRRO DG39/708) and also commenting on a fire, which spread rapidly because of the dryness, requiring a house to be pulled down to halt its progress (LLRRO DG39/708). Fast-developing early modern towns, with closely spaced wooden buildings, were vulnerable to fire, particularly during dry weather (Morgan 2016). Pasturage, and winter hay, for grazing animals is quick to suffer during a drought, and reports of dry, brown grass appear frequently in reports of dry weather, of both aesthetic and agricultural concern. Others also noted impacts on mills from the drying of watercourses, and moorland fires during the drought of 1785 (Garnier et al. 2015). In considering the archival accounts from 1785, the drought can be seen to have had meteorological, hydrological, agricultural and socio-economic impacts on the local communities.
Maintaining constant canal water supplies in the latter part of the eighteenth century appears to have been problematic, with 1785 a particularly difficult year. In 1797, the Trent and Mersey Canal Company (when proposing a new reservoir) reported to a parliamentary committee that they faced particularly severe water shortages in the years 1785, 1788, 1789, and 1791, 1792, 1793, 1794, 1795, and 1796 (SRO D593/V/3/29). The water shortages in 1785, 1788 and 1789 may be directly related to droughts, reflecting a possible national drought rich phase; Todd et al. (2013) note the period 1783–1791 at Oxford as one of the most severe drought periods (1767–2011). The water shortages in 1791–1796 are likely to be the result of a combination of dry weather and increased canal traffic. The onset of the 1788–1789 drought occurred in November 1788, as evidenced in both SPI-6 and SPI-12, with termination at the end of May 1789 (SPI-6) and mid-June 1789 (SPI-12). Whilst the summer of 1788 was not remarkably dry, March, April and May had between 54 and 84% of mean rainfall, which may have been sufficient to cause problems for the canals. The final months of 1788 were dry, with only 18 mm of rain in November and 3 mm of rain in December, and overall the year saw only 70% of mean annual rainfall at Chatsworth. The summer months of June and July were actually wet in 1789, both having more than double the mean rainfall; however, without the capability to actively manage the water using reservoirs, this rainfall will have been little use to the canal company.
It appears there is no simple relationship between rainfall and water shortages on canals. This is unsurprising, since water for canals was acquired from a combination of river and groundwater sources (including mine discharges); therefore, a delayed response to rainfall deficit is to be expected, as is regional variation (Lennard et al. 2014). Human factors, such as canal traffic and competition with other water users, also have a major influence, which could greatly affect amounts of water available during dry weather. The droughts of the 1780s, however, do seem to have had an impact on the canal network and should therefore be considered as factors in changing policies towards water use in the following years.
Impacts of insufficient water supplies on canals
The drought of 1785, and less severe droughts in 1788–1789 and in the 1790s, had a notable impact on the canals, because the water supply did not keep pace with water demand. Rarely were these shortages so severe that the canals became completely unnavigable to all traffic, but they often meant that boats were forced to navigate with significantly decreased loads (Boughey and Hadfield 1994; Freeman 1980). In 1797, a witness to the Lord’s Committee on the Bill for the Leek Branch of the Caldon Canal and Rudyard Reservoir stated that boats sometimes carried less than half a load in very dry weather, and often carried only three quarters of the normal load, and even following these reductions, could still be obliged to offload further goods on the canal banks to pass particularly shallow sections (SRO D593/V/3/29). Canal companies and boat operators faced both a reduction in income and higher costs when boats navigated with smaller loads.
The immediate financial cost was not the only problem created by water shortages. Repeatedly reducing loads risked damage to goods and extended delivery times. Significant transport delays might be faced by companies using canals to transport their raw materials and products, as a result of a build-up of goods in warehouses awaiting space on a boat for their onward journey. Delays at warehouses due to frosts, floods or water shortages were featured several times in the letters of Samuel Barnett and Company (SRO 6702/1), with occasions where goods were left waiting more than a month before the backlog was cleared and they could be put aboard a boat for transportation. The impression given by these letters is that canal transport was unreliable and unpredictable in part because of the vulnerability of the canal system to extreme weather.
In addition to direct impacts on the canal companies and those directly involved in trading using the canal network, there could be wider and unexpected implications of water shortages for the canal network. There were some materials, for example, paving stones and other road building materials transported by canal boat that in times of good water supply paid significantly reduced tolls, but which could not be carried on the canal during water shortages. Hence, in 1810, the inhabitants of Newcastle-under-Lyme could not repair their roads because the paving stones were delayed due to water shortages on the Caldon Canal (SRO Q/SB 1810 T/466). The impact of dry weather on canals might have far-reaching consequences, affecting everyday activities unconnected to the canal.
Competition and conflict
Water shortages on canals have previously been attributed to a combination of increasing competition for water and increasing traffic (Boughey and Hadfield 1994, p. 47). Undoubtedly, other water supply issues compounded the problems caused by dry weather, in particular competition between water users. Both water shortages and water supply innovation may have been driven by increasing competition for water. The canal companies were required by Act of Parliament to pay compensation for any water that they used to the deficit of other water users. Determining the impact of canals on the surrounding area was a time-consuming and expensive process, requiring agents of the canal companies, canal commissioners and landowners to enter into lengthy discussions.
Rivers suitable for operating mills would often have many mills and weirs along their length (Downward and Skinner 2005), and any mill negatively impacted by water being redirected for the canal would be entitled to compensation. In 1796, an agent of the Trent and Mersey Canal Company described the payments of compensation as ‘bothersome’ and ‘growing daily with the increase of trade and population’ (SRO D593/L/1/14/2). The Trent and Mersey Canal Company purchased at least one mill that was previously using the water that they needed to take to supply the canal. The Staffordshire and Worcestershire canal similarly leased water mills in lieu of paying compensation (SRO D3186/1/1/1). These, however, were not long-term solutions and only effective at a local level. To avoid competing with other water users, the canal companies were obliged to look for alternative water sources.
The economic pressure of compensating other users for loss or reduction of their water supply resulted in many canal companies investing in technologies and management techniques. Technical advances made it possible to increase the size or number of reservoirs and investing in machinery to pump water to where it was needed became a viable option and an obvious solution for many companies (Boughey and Hadfield 1994), but looking beyond rivers and streams for water supplies also became necessary.
Water shortages were almost exclusively a summer phenomenon, often coinciding with periods of dry weather. To describe them as simply an effect of growing competition for water misses a more complex story concerning the interaction between weather and water demand. It does not take into account the impossibility of maintaining constant water supplies during periods of low flow, without the use of storage reservoirs.
New infrastructure was needed to allow canal companies to make use of rain and flood water during drier times of the year. Earlier small reservoirs were insufficient to hold excess water during times of heavy rainfall, and water frequently flowed over the top of their dams (SRO D593/V/3/29). On the Trent and Mersey Canal, nearly all the reported water shortages affected the Caldon Canal, a branch which joins the main canal near its summit (Hadfield 1969; Lindsay 1979, p. 64). Although navigable and an important link to sources of limestone, a major function of the Caldon Canal was to bring water from the three main reservoirs at Knypersley, Stanley and Bagnall (Binnie 1987, p. 112; SRO D593/V/3/29). The Caldon Canal’s two roles as a feeder and as a navigable canal were not always compatible, and the water in the Caldon Canal itself was drawn down into the main canal during periods of dry weather.
With increasing competition from other water users, the Trent and Mersey Company investigated new sources of water, and in 1793, without finding any significant source of water from nearby streams or springs, they started to plan a new reservoir to catch flood and rainwater, which would be much larger than any that had been built in Britain before.
In 1797, they obtained an Act of Parliament and built Rudyard Reservoir, in a valley in the North Staffordshire. With a surface area of 65 ha (0.65km2), Rudyard is more comparable to later drinking water reservoirs than its canal predecessors (which rarely exceeded 10 ha). When the bill for its construction was taken to parliament, the only precedent was a reservoir ‘not quite so large, but pretty nearly so … belonging to the Rochdale Canal’ (SRO D593/V/3/29). It appears that the planners of Rudyard were unaware of the Lac de Saint-Ferréol which had supplied the Canal du Midi in France since 1672 (Mukerji 2009). In this light, Rudyard reservoir was the legislative test case for later reservoirs in Britain. It was designed to be about 2 miles in length (3 km), with dam heights quoted as between 42-ft (12.8 m) and 30-ft (9 m) high, with an innovative dam to match its innovative size, designed by canal engineer John Rennie (Binnie 1987).
The new scheme faced considerable opposition; many of the arguments against the reservoir focused on the size of the proposed reservoir and suspicions of a hidden motive behind the construction. Opponents to the scheme suggested that Rudyard was too big to be filled with rainwater alone and that the Trent and Mersey Company was planning to divert river water into it after construction (TNA RAIL 1019/15/41). Without precedent, Rudyard Reservoir represented the beginning of a new phase of water engineering and used water in a way and on a scale previously unseen in Britain.
This period can also be seen as an important step in the establishment of rights over water; Rudyard reservoir is important as the legislative test case which paved the way for building large capacity reservoirs, which are an essential component of the modern provision of reliable and resilient modern domestic water supplies. However, Rudyard also had other, more direct long-term impacts on reservoir building, since it has been suggested that the innovative dam was used as a prototype for at least two other major dams (Binnie 1987). These include later canal reservoirs, such as the enlargement of Knypersley, another of the Trent and Mersey Company’s reservoirs, but also Glencorse Reservoir (Binnie 1987). Glencorse was built in the early nineteenth century to supplement Edinburgh’s public water supply and provides a direct link between the early large capacity reservoirs and later potable water reservoirs. Rudyard was also the first large compensation reservoir, supplying a gauged amount of water equal to the flow of the River Churnet in normal conditions at all times of year (ICE REN/RB/02/001). The construction of Rudyard Reservoir, therefore, could be seen as a technological milestone.
A number of former canal reservoirs were repurposed as potable water reservoirs in the twentieth century, providing a further link between canal reservoirs and the modern water supply. Most small and some large reservoirs, such as Rudyard and Chasewater, were retained by the canal companies despite the decline in commercial canal use. However, others have become part of the domestic water supply system, such as the Rochdale Canal reservoirs at Blackstonedge and Chelburn, which now provide potable water to Manchester. In this way, canal reservoirs directly feed into modern drought preparedness.
Following restoration work undertaken by small groups of enthusiasts since the 1960s and 1970s, British canals have experienced a renewal of interest and use. The impact and likelihood of water shortages on canals today are significantly reduced compared with during the industrial revolution, with canal water supplies centrally managed (since 2012 by the Canals and Rivers Trust) making competition between canal companies no longer an issue. Canal traffic is also more flexible and less critical, consisting mainly of leisure boaters, rather than providing deliveries essential for the industry. Similar issues with balancing weather, demand and competition between water users, as faced by the canal companies at the turn of the nineteenth century, remain present today for other suppliers of water, such as water companies.
Although some of the water shortages discussed appear to have been a direct consequence of drought, it remains that the canal companies were ill prepared for extreme weather, and perhaps as the shortages in the 1790s demonstrate, even ill prepared for normal conditions in the face of changing water demands. Lack of preparedness for drought in the face of changing demand and expectations has been a concern across time, and one that remains relevant today (Taylor et al. 2009).
The development of new water supply solutions for the canal network, which following comparison of archival material and rainfall data appears to have been driven in part by responses to drought, was an important phase in the development of water supply systems in Britain, which has been previously overlooked. Droughts had a serious impact on the early industrial canal network and were a source of anxiety for companies reliant on canal transport. By bringing together both instrumental and archival sources, an enhanced understanding of the effects of dry weather on the canal network is beginning to emerge. The reconstructed composite precipitation series for Chatsworth House provides a valuable new long series for Central England. Droughts identified within the Chatsworth House series since 1800–present are not discussed here but are comparable to those identified in other studies, such as 1870–1872 (Todd et al. 2013), 1932–35 (Van Lieshout 2016). 1976 (Lennard et al. 2014) and 1996 (Spraggs et al. 2015). However, the wet period 1877–1883 is particularly notable, even compared with other long series. It is replicated and comparable in other local short series, suggesting that this period was particularly wet and worthy of further analysis. Water shortages linked to the dry weather and drought events in the 1780s and 1790s led to improvements in canal infrastructure, particularly through the development of larger reservoirs. The development of canal reservoirs preceded and informed the reservoirs developed in the nineteenth and twentieth centuries for drinking water and pioneered systems of providing compensation water to rivers and streams.
This research would not have been possible without the support and cooperation of the Staffordshire Record Office.
This research was funded by the Arts and Humanities Research Council, grant number AH/N005147/1.
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