Abstract
Purpose
Soil erosion is a major threat to agricultural sustainability in the hills of Nepal. However, little is known about the soil erosion rates at a small catchment scale in this region.
Materials and methods
In this study, the soil redistribution rates in a typical small hilly catchment in the Ramechhap District of Nepal were evaluated using the 137Cs and 210Pbex tracer techniques. Nine representative slopes under three land uses and a reference site from the gentle sloping forest land within the catchment were selected as sample plots. A downhill transect was built in each sample plot, and soil samples were collected at 5-m intervals along the transects.
Results and discussion
The results showed that the spatial variations in radionuclide inventory and soil erosion rates measured by 137Cs measurements were highly consistent with equivalent estimates from 210Pbex measurements, suggesting the potential for using 137Cs and 210Pbex measurements to estimate soil redistribution rates. All 137Cs and 210Pbex inventories on the slopes were less than the reference values, indicating that net soil loss has occurred at all of the sampling points. The net erosion rates from sloping farmland (37.08 t ha−1 year−1) and shrub land (32.52 t ha−1 year−1) were significantly higher than those from forest land (14.91 t ha−1 year−1). Furthermore, the soil erosion rates obtained from 210Pbex measurements were higher than those obtained from 137Cs measurements, which implies that soil erosion in the catchment was accelerated during the last two decades. The net soil loss from the study catchment was estimated to be 31.29 t ha−1 year−1, which is mainly contributed by shrub land (55.08%) and sloping farmland (37.68%).
Conclusions
These results indicate that shrub land and sloping farmland are vulnerable to erosion, which should be specifically considered in the sustainable management of small agricultural catchments in the mid-hills of Nepal, especially in dry valley regions.
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References
Altieri V, De Franco S, Lombardi F, Marziliano PA, Menguzzato G, Porto P (2018) The role of silvicultural systems and forest types in preventing soil erosion processes in mountain forests: a methodological approach using cesium-137 measurements. J Soils Sediments 18:3378–3387. https://doi.org/10.1007/s11368-018-1957-8
Anache JAA, Wendland EC, Oliveira PTS, Flanagan DC, Nearing MA (2017) Runoff and soil erosion plot-scale studies under natural rainfall: a meta-analysis of the Brazilian experience. Catena 152:29–39. https://doi.org/10.1016/j.catena.2017.01.003
Appleby PG, Oldfield F (1992) Application of lead-210 to sedimentation studies. Clarendon Press, Oxford, UK
Atreya K, Sharma S, Bajracharya RM, Rajbhandari NP (2006) Applications of reduced tillage in hills of central Nepal. Soil Tillage Res 88:16–29. https://doi.org/10.1016/j.still.2005.04.003
Baidya SK, Shrestha ML, Sheikh M (2008) Trends in daily climatic extremes of temperature and precipitation in Nepal. J Hydrol Meteorol 5:38–51
Baniya B, Tang Q, Pokhrel Y, Xu X (2019) Vegetation dynamics and ecosystem service values changes at national and provincial scales in Nepal from 2000 to 2017. Environ Dev 32:100464. https://doi.org/10.1016/j.envdev.2019.100464
Borrelli P, Robinson DA, Fleischer LR, Lugato E, Ballabio C, Alewell C, Meusburger K, Modugno S, Schütt B, Ferro V, Bagarello V, Oost KV, Montanarella L, Panagos P (2017) An assessment of the global impact of 21st century land use change on soil erosion. Nat Commun 8:2013. https://doi.org/10.1038/s41467-017-02142-7
Cerdan O, Govers G, le Bissonnais Y, van Oost K, Poesen J, Saby N, Gobin A, Vacca A, Quinton J, Auerswald K, Klik A, Kwaad FJPM, Raclot D, Ionita I, Rejman J, Rousseva S, Muxart T, Roxo MJ, Dostal T (2010) Rates and spatial variations of soil erosion in Europe: a study based on erosion plot data. Geomorphology 122:167–177. https://doi.org/10.1016/j.geomorph.2010.06.011
Cui Y, Fang L, Guo X, Han F, Ju W, Ye L, Wang X, Tan W, Zhang X (2019) Natural grassland as the optimal pattern of vegetation restoration in arid and semi-arid regions: evidence from nutrient limitation of soil microbes. Sci Total Environ 648:388–397. https://doi.org/10.1016/j.scitotenv.2018.08.173
Das R, Bauer S (2012) Bio-economic analysis of soil conservation technologies in the mid-hill region of Nepal. Soil Tillage Res 121:38–48. https://doi.org/10.1016/j.still.2012.01.016
de Vente J, Poesen J, Arabkhedri M, Verstraeten G (2007) The sediment delivery problem revisited. Prog Phys Geogr 31:155–178. https://doi.org/10.1177/0309133307076485
DHM (2017) Observed climate trend analysis in the districts and physiographic regions of Nepal (1971-2014). Department of Hydrology and Meteorology. Kathmandu, Nepal
El Kateb H, Zhang H, Zhang P, Mosandl R (2013) Soil erosion and surface runoff on different vegetation covers and slope gradients: a field experiment in Southern Shaanxi Province, China. Catena 105:1–10. https://doi.org/10.1016/j.catena.2012.12.012
Fox DM, Bryan RB (2000) The relationship of soil loss by interrill erosion to slope gradient. Catena 38:211–222. https://doi.org/10.1016/S0341-8162(99)00072-7
García-Ruiz JM (2010) The effects of land uses on soil erosion in Spain: a review. Catena 81:1–11. https://doi.org/10.1016/j.catena.2010.01.001
García-Ruiz JM, Beguería S, Nadal-Romero E, González-Hidalgo JC, Lana-Renault N, Sanjuán Y (2015) A meta-analysis of soil erosion rates across the world. Geomorphology 239:160–173. https://doi.org/10.1016/j.geomorph.2015.03.008
Gardner RAM, Gerrard AJ (2003) Runoff and soil erosion on cultivated rainfed terraces in the Middle Hills of Nepal. Appl Geogr 23:23–45. https://doi.org/10.1016/S0143-6228(02)00069-3
Gaspar L, Navas A, Walling DE, Machín J, Gómez Arozamena J (2013) Using 137Cs and 210Pbex to assess soil redistribution on slopes at different temporal scales. Catena 102:46–54. https://doi.org/10.1016/j.catena.2011.01.004
Ghimire CP, Bruijnzeel LA, Lubczynski MW, Bonell M (2012) Rainfall interception by natural and planted forests in the Middle Mountains of Central Nepal. J Hydrol 475:270–280. https://doi.org/10.1016/j.jhydrol.2012.09.051
Gonzalez-Hidalgo JC, Batalla RJ, Cerda A (2013) Catchment size and contribution of the largest daily events to suspended sediment load on a continental scale. Catena 102:40–45. https://doi.org/10.1016/j.catena.2010.10.011
Hancock GR, Ovenden M, Sharma K, Rowlands W, Gibson A, Wells T (2020) Soil erosion – The impact of grazing and regrowth trees. Geoderma 361:114102. https://doi.org/10.1016/j.geoderma.2019.114102
He Q, Walling DE (1997) The distribution of fallout 137Cs and 210Pb in undisturbed and cultivated soils. Appl Radiat Isot 48:677–690. https://doi.org/10.1016/S0969-8043(96)00302-8
Henderson GM, Maier-Reimer E (2002) Advection and removal of 210Pb and stable Pb isotopes in the oceans: a general circulation model study. Geochim Cosmochim Acta 66:257–272. https://doi.org/10.1016/S0016-7037(01)00779-7
Huh CA, Su CC (2004) Distribution of fallout radionuclides (7Be, 137Cs, 210Pb and 239,240Pu) in soils of Taiwan. J Environ Radioact 77:87–100. https://doi.org/10.1016/j.jenvrad.2004.03.002
Joshi N, Dongol R (2018) Severity of climate induced drought and its impact on migration: a study of Ramechhap District, Nepal. Trop Agric Res 29:194–211. https://doi.org/10.4038/tar.v29i2.8289
Lal R (2001) Soil degradation by erosion. Land Degrad Dev 12:519–539. https://doi.org/10.1002/ldr.472
Li Z, Fang H (2016) Impacts of climate change on water erosion: a review. Earth Sci Rev 163:94–117. https://doi.org/10.1016/j.earscirev.2016.10.004
Liu QQ, Singh VP (2004) Effect of microtopography, slope length and gradient, and vegetative cover on overland flow through simulation. J Hydrol Eng 9:375–382. https://doi.org/10.1061/(ASCE)1084-0699(2004)9:5(375)
Liu Y, Xin Y, Xie Y, Wang W (2019) Effects of slope and rainfall intensity on runoff and soil erosion from furrow diking under simulated rainfall. Catena 177:92–100. https://doi.org/10.1016/j.catena.2019.02.004
Mabit L, Benmansour M, Walling DE (2008) Comparative advantages and limitations of the fallout radionuclides 137Cs, 210Pbex and 7Be for assessing soil erosion and sedimentation. J Environ Radioact 99:1799–1807. https://doi.org/10.1016/j.jenvrad.2008.08.009
Merz J, Nakarmi G, Shrestha SK, Dahal BM, Dangol PM, Dhakal MP, Dongol BS, Sharma S, Shah PB, Weingartner R (2009) Water: A scarce resource in rural watersheds of Nepal’s middle mountains. Mt Res Dev 23:41–49. https://doi.org/10.1659/0276-4741(2003)023[0041:WASRIR]2.0.CO;2
Nearing M, Pruski F, O’Neal MR (2004) Expected climate change impacts on soil erosion rates: a review. J Soil Water Conserv 59:43–50
Niraula RR, Gilani H, Pokharel BK, Qamer FM (2013) Measuring impacts of community forestry program through repeat photography and satellite remote sensing in the Dolakha district of Nepal. J Environ Manag 126:20–29. https://doi.org/10.1016/j.jenvman.2013.04.006
Nyssen J, Poesen J, Moeyersons J, Deckers J, Haile M, Lang A (2004) Human impact on the environment in the Ethiopian and Eritrean highlands—a state of the art. Earth Sci Rev 64:273–320. https://doi.org/10.1016/S0012-8252(03)00078-3
Pangali Sharma TP, Zhang J, Koju UA, Zhang S, Bai Y, Suwal MK (2019) Review of flood disaster studies in Nepal: a remote sensing perspective. Int J Disaster Risk Reduct 34:18–27. https://doi.org/10.1016/j.ijdrr.2018.11.022
Parsons AJ, Wainwright J, Brazier RE, Powell DM (2006) Is sediment delivery a fallacy? Earth Surf Process Landf 31:1325–1328. https://doi.org/10.1002/esp.1395
Paudel B, Zhang Y-L, Li S, Liu L, Wu X, Khanal N (2016) Review of studies on land use and land cover change in Nepal. J Mt Sci 13:643–660. https://doi.org/10.1007/s11629-015-3604-9
Paudel B, Zhang Y, Li S, Wu X (2017) Spatiotemporal reconstruction of agricultural land cover in Nepal from 1970 to 2010. Reg Environ Chang 17:2349–2357. https://doi.org/10.1007/s10113-017-1164-y
Paudel B, Zhang Y, Yan J, Rai R, Li L (2019) Farmers’ perceptions of agricultural land use changes in Nepal and their major drivers. J Environ Manag 235:432–441. https://doi.org/10.1016/j.jenvman.2019.01.091
Porto P, Walling DE, Callegari G, Catona F (2006) Using fallout Lead-210 measurements to estimate soil erosion in three small catchments in southern Italy. Water Air Soil Pollut 6:657–667. https://doi.org/10.1007/s11267-006-9050-5
Porto P, Walling DE, Capra A (2014) Using 137Cs and 210Pbex measurements and conventional surveys to investigate the relative contributions of interrill/rill and gully erosion to soil loss from a small cultivated catchment in Sicily. Soil Tillage Res 135:18–27. https://doi.org/10.1016/j.still.2013.08.013
Porto P, Walling DE, Cogliandro V, Callegari G (2016) Exploring the potential for using 210Pbex measurements within a re-sampling approach to document recent changes in soil redistribution rates within a small catchment in southern Italy. J Environ Radioact 164:158–168. https://doi.org/10.1016/j.jenvrad.2016.06.026
Porto P, Walling DE, Ferro V (2001) Validating the use of caesium-137 measurements to estimate soil erosion rates in a small drainage basin in Calabria, southern Italy. J Hydrol 248:93–108. https://doi.org/10.1016/S0022-1694(01)00389-4
Rodway-Dyer SJ, Walling DE (2010) The use of 137Cs to establish longer-term soil erosion rates on footpaths in the UK. J Environ Manag 91:1952–1962. https://doi.org/10.1016/j.jenvman.2010.04.014
Saco PM, Moreno-de las Heras M, Keesstra S, Baartman J, Yetemen O, Rodríguez JF (2018) Vegetation and soil degradation in drylands: non linear feedbacks and early warning signals. Curr Opin Environ Sci Health 5:67–72. https://doi.org/10.1016/j.coesh.2018.06.001
Shen H, Zheng F, Wen L, Han Y, Hu W (2016) Impacts of rainfall intensity and slope gradient on rill erosion processes at loessial hillslope. Soil Tillage Res 155:429–436. https://doi.org/10.1016/j.still.2015.09.011
Su Z-a, Xiong D-h, Deng W, Dong Y-f, Ma J, Padma CP, Gurung BS (2016) 137Cs tracing dynamics of soil erosion, organic carbon, and total nitrogen in terraced fields and forestland in the Middle Mountains of Nepal. J Mt Sci 13:1829–1839. https://doi.org/10.1007/s11629-015-3581-z
Upadhayay HR, Smith HG, Griepentrog M, Bodé S, Bajracharya RM, Blake W, Cornelis W, Boeckx P (2018) Community managed forests dominate the catchment sediment cascade in the mid-hills of Nepal: a compound-specific stable isotope analysis. Sci Total Environ 637-638:306–317. https://doi.org/10.1016/j.scitotenv.2018.04.394
Vanmaercke M, Maetens W, Poesen J, Jankauskas B, Jankauskiene G, Verstraeten G, de Vente J (2012) A comparison of measured catchment sediment yields with measured and predicted hillslope erosion rates in Europe. J Soils Sediments 12:586–602. https://doi.org/10.1007/s11368-012-0479-z
Vanmaercke M, Poesen J, Maetens W, de Vente J, Verstraeten G (2011) Sediment yield as a desertification risk indicator. Sci Total Environ 409:1715–1725. https://doi.org/10.1016/j.scitotenv.2011.01.034
Walling DE, He Q (1999a) Improved models for estimating soil erosion rates from Cesium-137 measurements. J Environ Qual 28:611–622. https://doi.org/10.2134/jeq1999.00472425002800020027x
Walling DE, He Q (1999b) Using fallout Lead-210 measurements to estimate soil erosion on cultivated land. Soil Sci Soc Am J 63:1404–1412. https://doi.org/10.2136/sssaj1999.6351404x
Wang L, Dalabay N, Lu P, Wu F (2017) Effects of tillage practices and slope on runoff and erosion of soil from the Loess Plateau, China, subjected to simulated rainfall. Soil Tillage Res 166:147–156. https://doi.org/10.1016/j.still.2016.09.007
Wen A et al (2000) Soil erosion rate using 137Cs technique in the middle Yalungtsangpo. J Soil Water Conserv 14:47–50 (in Chinese)
Wu H, Xiong D, Liu B, Zhang S, Yuan Y, Fang Y, Chidi CL, Dahal NM (2019) Spatio-temporal analysis of drought variability using CWSI in the Koshi River Basin (KRB). Int J Environ Res Public Health 16. https://doi.org/10.3390/ijerph16173100
Xiong M, Sun R, Chen L (2019) A global comparison of soil erosion associated with land use and climate type. Geoderma 343:31–39. https://doi.org/10.1016/j.geoderma.2019.02.013
Yu Y, Wei W, Chen L, Feng T, Daryanto S (2019) Quantifying the effects of precipitation, vegetation, and land preparation techniques on runoff and soil erosion in a Loess watershed of China. Sci Total Environ 652:755–764. https://doi.org/10.1016/j.scitotenv.2018.10.255
Zapata F (2002) Handbook for the assessment of soil erosion and sedimentation using environmental radionuclides. Kluwer Academic Publishers, Dordrecht, Netherlands. https://doi.org/10.1007/0-306-48054-9_1
Zhang C, Xue S, Liu G-B, Song Z-L (2011) A comparison of soil qualities of different revegetation types in the Loess Plateau, China. Plant Soil 347:163–178. https://doi.org/10.1007/s11104-011-0836-5
Zhang S, Xiong D, Zhang B, Yang D, Xiao L, Fang H (2016) Soil erosion resistance under dry-wet alternation in different layers of dry-hot Valley Region. Transactions of the Chinese Society for Agricultural Machinery 47:152-159 + 212 (in Chinese)
Zhang X, Higgitt D, Walling D (1990) A preliminary assessment of the potential for using Cesium-137 to estimate rates of soil-erosion in the Loess Plateau of China. Hydrol Sci J 35:243–252. https://doi.org/10.1080/02626669009492427
Zhang X, Hu M, Guo X, Yang H, Zhang Z, Zhang K (2018) Effects of topographic factors on runoff and soil loss in Southwest China. Catena 160:394–402. https://doi.org/10.1016/j.catena.2017.10.013
Zhang X, Qi Y, Walling DE, He X, Wen A, Fu J (2006) A preliminary assessment of the potential for using 210Pbex measurement to estimate soil redistribution rates on cultivated slopes in the Sichuan Hilly Basin of China. Catena 68:1–9. https://doi.org/10.1016/j.catena.2006.03.012
Zhang X, Walling D, Feng M, Wen A (2003) 210Pbex depth distribution in soil and calibration models for assessment of soil erosion rates from 210Pbex measurements. Chin Sci Bull 48:813–818. https://doi.org/10.1007/BF03187059
Zhang X, Zhang Y, He X, Long Y, Li H (2010) Response of 210Pbex inventory to changes in erosion rates in soil of cultivated land. Acta Pedol Sin 47:593–597 (in Chinese)
Zhang XC (2007) A comparison of explicit and implicit spatial downscaling of GCM output for soil erosion and crop production assessments. Clim Chang 84:337–363. https://doi.org/10.1007/s10584-007-9256-1
Zhu R, Fang Y, Neupane N, Koirala S, Zhang C (2020) Drought stress and livelihood response based on evidence from the Koshi River Basin in Nepal: modeling and applications. Water 12:1610. https://doi.org/10.3390/w12061610
Acknowledgments
We sincerely appreciate Kanchan Shrestha for providing constructive comments towards field work and manuscript preparation. We also thank Yifan Dong and Bintao Liu for collecting soil samples. We are also indebted to the Department of Hydrology and Meteorology, Government of Nepal, for providing rainfall data used in this study.
Funding
This research was funded by the special project from Branch of Sustainable Mountain Development, Kathmandu Center for Research and Education, CAS-TU, and the NSFC-ICIMOD Joint Research Project (grant number 41661144038).
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Yuan, Y., Xiong, D., Wu, H. et al. Using 137Cs and 210Pbex to trace soil erosion rates for a small catchment in the mid-hills of Nepal. J Soils Sediments 21, 403–418 (2021). https://doi.org/10.1007/s11368-020-02760-7
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DOI: https://doi.org/10.1007/s11368-020-02760-7