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[1]LAI Ge-ying,LIU Zhi-yong,LIU Yin-wen.A Simulation-based Research on the Hydrological Response of Land Use/Cover and Vegetation Changes in Watershed Scale[J].Research of Soil and Water Conservation,2008,15(04):10-14.

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A Simulation-based Research on the Hydrological Response of Land Use/Cover and Vegetation Changes in Watershed Scale

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 04 Page number: 10-14 Column: Public date: 2008-08-20

Title:: A Simulation-based Research on the Hydrological Response of Land Use/Cover and Vegetation Changes in Watershed Scale

Author(s):: LAI Ge-ying^1,2, LIU Zhi-yong², LIU Yin-wen²; 1. Key Lab of Poyang Lake Ecological Environment and Resource Development, Jiangxi Normal University, Nanchang 330022, China;
2. School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China

Keywords:: distributed hydrological model; vegetation change; hydrological response

CLC:: P333.5;F301.24

DOI:: -

Abstract:: This paper presented a research on the hydrological responses of watershed-scale land use/cover and vegetation changes under the background of human activities with Meijiang watershed as study area using physically-based and parameter-distributed hydrological model SWAT.Leaf area index (LAI) got from remote sensing technology was used in this simulation in the format of plant growth database in SWAT to express the watershed vegetation situation.Variable-controlled method was used to simulate the response of watershed hydro-characteristics and hydro-processes to land use/cover and vegetation changes.The results show that annual runoff in Meijiang watershed increases 5.4% (which is 10.2% during dry season,2.6% during wet season) because of the changes of vegetation in 15 years (1987-2001).On the other hand,the results also show that the impact of vegetation change to water flow in Meijiang watershed has a nonlinear tendency,which means watershed water flow increases with the increasing of LAI of vegetation but the increment of water flow is the largest due to vegetation change in medium rainstorm.The increasing of LAI will obviously result in time delay effect of flood peak and gentle water-flow recession characteristics.

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