Abstract
In the arid inland river basins of northwestern China, human activities control almost all the surface hydrologic processes. The potential effects of these altered hydrologic processes are gradually becoming clear, especially since the 2000 implementation of the integrated water resources management projects in the Shiyang River, the Heihe River, the Tarim River, and the Shuler River. While the appearance of these eco-hydrology changes and consequent environmental effects in the oasis has attracted broad attention, related research is still lacking. Eco-hydrological process changes in the desert-oasis ecotone were investigated in the Pingchuan irrigation district in the middle reaches of the Heihe River. The results showed that the annual average amount of surface water irrigation during the past 20 years has decreased by 1.498×107 m3, while the annual average amount of well irrigation has increased by 1.457×107 m3, since 2000, when the State Council of China approved the water diversion scheme for the Heihe River Basin. The groundwater depth before the water diversion scheme generally varied between 2.44–3.19 m (average 2.73±0.24 m), while that after the water diversion scheme has varied between 3.08–4.01 m (average 3.79±0.62 m). The distribution area of <3 m groundwater depth decreased from 3612 to 394 hm2; while the distribution area of >3 m groundwater depth increased from 853 to 3843 hm2. However, although the hydrologic processes changed dramatically, no significant effects on vegetation productivity in the desert-oasis ecotone were detected during the study period.
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References
Chang X L, Zhang N, Sun X Y, et al. 2012. Landscape change during the oasis expansion process in an arid zone (in Chinese). J Desert Res, 32: 857–862
Chen X, Luo G P. 2008. Research and progress of oasis ecology in arid areas (in Chinese). Arid Land Geogr, 31: 487–495
Chen Y N, Li W H, Chen Y P, et al. 2007. Water conveyance in a dry riverbed and ecological restoration in the lower reaches of the Tarim River, China (in Chinese). Acta Ecol Sin, 27: 538–545
Dawson T E, Pate J S. 1995. Seasonal water uptake and movement in the root systems of phraeatophytic plants of dimorphic root morphology: A stable isotope investigation. Oecologia, 107: 13–20
Fang C L, Bao C, Huang J C. 2007. Management implications to water resources constraint force on socio-economic system in rapid urbanization: A case study of the Hexi Corridor, NW China. Water Resour Manag, 21: 1613–1633
Jia B Q. 1996. Approach to some theoretical problems on oasis landscapes (in Chinese). Arid Land Geogr, 19: 58–65
Jia B Q, Ci L J, Han D L, et al. 2000. Review and problem analysis of oasis research in arid regions (in Chinese). Adv Earth Sci, 15: 381–388
Jiao Y M, Ma M G, Xiao D N. 2003. Research on the landscape patterns of Zhangye Oasis in the middle reaches of the Heihe River (in Chinese). J Glaciol Geocryol, 25: 94–99
Han D L. 1999. The progress of research on oases in China (in Chinese). Sci Geogr Sin, 9: 313–319
Jolly I D, Walker G R. 1996. Is the field water use of Eucalyptus largiflorens F. Muell. affected by short-term flooding? Australia J Ecol, 21: 173–183
Li Q S, Zhao W Z, Ma C C. 2004. Theory and application of forage and livestock coupling for mountainous-oasis-desert country in the Heihe River basin—A study of the Linze demonstration area in the middle reaches of the Heihe River basin (in Chinese). Acta Pratacul Sin, 13: 13–20
Li X Y. 2011. Mechanism of coupling, response and adaptation among soil, vegetation and hydrology in arid and semiarid regions (in Chinese). Sci Sin Terrae, 41: 1721–1730
Li Y, Xu H. 2008. Water and carbon balances of Haloxylon ammodendron: Integrated study at the physiological, plant, and community level (in Chinese). Arid Land Geogr, 31: 313–323
Markham B L, Barker J L. 1986. Landsat MSS and TM post calibration dynamic ranges, exoatmospheric reflectances and at-satellite temperature. Earth Observation Satell Landsat Techn Notes, 1: 328–343
Matlack G R. 1993. Microenvironment variation within and among forest edge sites in the eastern United States. Biol Conser, 6: 185–194
Mensforth L J, Thorburn P J, Tyerman S D, et al. 1994, Sources of water used by riparian Eucalyptus camaldulensis overlying highly saline groundwater. Oecologia, 100: 21–28
Shi P L, Li W H, Wang J X. 2002. Three-dimensional canopy structure in the Timberline ecotone dominated by Abies faxoniana (in Chinese). Acta Ecol Sin, 22: 1819–1824
Thorburn P J, Walker G R. 1994. Variations in stream water uptake by Eucalyptus camaldulensis with differing access to stream water. Oecologia, 100: 293–301
Wales B A. 1972. Vegetation analysis of north and south edges in a mature oak-hickory forest. Ecol Monogr, 42: 451–470
Wang P Y, Li K Q, Gao W Y, et al. 2011. Glacier changes in the Heihe River basin over the past 50 years in the context of climate changes (in Chinese). Resour Sci, 33: 399–407
Wang Y X, Zhang X L, Kuo Y P. 1999. Study on oasis regional systems and the spatial development (in Chinese). Arid Land Geogr, 22: 72–79
Xu H, Li Y. 2006. Water use strategy of three central Asian desert shrubs and their responses to rain pulse events. Plant Soil, 285: 5–17
Xu H Q. 2008. Comparison of the models for the normalization of Landsat imagery (in Chinese). Geo-Inf Sci, 10: 294–301
Yan J F, Chen X, Luo G P, et al. 2006. Temporal and spatial variability response of groundwater level to land use/land cover change in oases in arid areas. Chin Sci Bull, 51(Supp1): 51–59
Yuan W, Guo Z L, Wu J L, et al. 2006. Analysis of water resources carrying capacity of the Heihe River basin (in Chinese). Acta Ecol Sin, 26: 2108–2114
Zhang L Y, Wang L A, Shi Q. 1995. On the oasis genesis types and evolution in time and space (in Chinese). J Arid Land Resour Environ, 9: 32–43
Zhang X S, Shi P J. 2003. Theory and practice of marginal ecosystem management (in Chinese). Acta Bot Sin, 45: 1137–1138
Zhao C Y, Wang Y C. 2005. Study on spatial and temporal dynamic of soil water content in a desert-oasis ecotone (in Chinese). J Soil Water Conserv, 19: 124–127
Zhao W Z, Chang X L, He Z B. 2003a. The response of distribution patterns of protective forest in Ejina to hydrological processes (in Chinese). Sci Sin Terrae, 33(Suppl): 21–30
Zhao W Z, Chang X L, Li Q S, et al. 2003b. Relationship between the structural component biomass of a reed population and ground water depth in a desert oasis (in Chinese). Acta Ecol Sin, 23:1138–1146
Zhao W Z, Niu Z R, Chang X L, et al. 2010. Water consumption in an artificial desert oasis based on net primary productivity. Sci China Earth Sci, 53: 1358–1364
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Zhao, W., Chang, X. The effect of hydrologic process changes on NDVI in the desert-oasis ecotone of the Hexi Corridor. Sci. China Earth Sci. 57, 3107–3117 (2014). https://doi.org/10.1007/s11430-014-4927-z
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DOI: https://doi.org/10.1007/s11430-014-4927-z