Dissertation > Astronomy,Earth Sciences > Surveying and Mapping > Cadastral school > Cadastral Survey

Analysis on Land Use/Land Cover Change of Different Slope and Impacts on Surface Runoff in Eastern Section of Upper Reaches of Hutuo River Basin

Author HuoYongWei
Tutor GeJingFeng
School Hebei Normal
Course Physical Geography
Keywords Hutuo River Land use / land cover SWAT model Surface runoff
CLC P271
Type Master's thesis
Year 2005
Downloads 440
Quotes 5
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Land use / land cover change is a global change research frontier and hot . Land use / land cover change has not only changed the face of the natural landscape , but also affect the landscape material recycling and energy distribution , and its impact on regional climate , soil , water , and the water quality is profound . The hydrological effects as an important environmental effects of LUCC one LUCC research priorities and focus . Land use / land cover change alters the surface evaporation , soil moisture conditions and land cover is the interception , the impact of the initial conditions of the surface runoff , have a direct impact on the watershed hydrological processes , cumulative changes affect basin water balance . The Hutuo River upstream of the eastern section of the Shijiazhuang source of drinking water , the natural barrier of the North China Plain , the ecological environment is fragile , sensitive to environmental changes , changes in the ecological environment of the North China and the region 's land use / land cover change are closely related research significance in the area is particularly important. Distributed hydrological model SWAT to understand and reveal the impact of land use / land cover change on surface runoff mechanism has important theoretical and practical significance . Based on two remote sensing data in the study area in 1987 and 2000 , the use of RS, GIS tools and statistical methods to analyze different slope , land use / land cover change . Distributed hydrological model (SWAT model ) , followed by the use of Building Watershed database by other factors fixed , changing only the land cover to simulate different slope ( 15 ° to 25 ° gt ; 25 ° ) changes in surface runoff , and so to explore different slopes under various land cover types on surface runoff mechanism . The results show that : 1) 15 ° to 25 ° : arable land 937hm ~ 2, total study a total area of ??0.51% , runoff depth increased 0.08mm forests , grasslands of runoff depth decreases 0.18mm ; the grasslands area for 45,516 hm ~ 2, accounting for 24.56% of the total area of the study , grassland conversion to cropland runoff depth increased 1.10mm, grassland conversion the runoff depth woodland increase 2.03mm ; woodland area of ??45 516 hm to 2 , the total study a total area of ??24.56% , woodland into farmland runoff depth is reduced to 0.89mm, the conversion of forest land to grassland runoff depth decreases 0.93mm . Grassland converted to woodland runoff depth increased , followed by grassland conversion to cropland .

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