| Title: | Investigation into the impacts of land-use change on runoff generation characteristics in the Upper Huaihe River Basin, China |
| Authors: | Li, Q., T. Cai, M. Yu, G. Lu, W. Xie and X. Bai |
| Year: | 2013 |
| Journal: | Journal of Hydrologic Engineering |
| Volume (Issue): | 18(11) |
| Pages: | 1464–1470 |
| Article ID: | |
| DOI: | 10.1061/(ASCE)HE.1943-5584.0000489 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | land use change |
| Secondary Application Category: | hydrologic assessment |
| Watershed Description: | 10,190 km^2 Upper Huaihe River, located in northeastern China. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | |
| Abstract: | Land-use change has significant impacts on hydrologic processes at the watershed
level, thus, quantitative assessment on the impacts of land-use change is vital for basin
environment protection and water resources sustainable development. Owing largely to computer
and GIS technology improvements, the distributed hydrological models, which allow describing
the temporal variability and spatial distribution of water balance components, offer an effective
approach to quantify the land-use change effects on watershed water quantity. In this study, Soil
and Water Assessment Tool (SWAT) model was used to simulate land-use change effects on water
quantity in the upper Huaihe river basin above the Xixian hydrological controlling station with a
catchment area of 10,190 km^2 by the use of three-phase (1980s, 1990s, 2000s) land-use maps, soil
type map (1:200000), 1980 to 2008 daily time series of rainfall from the upper Huaihe river basin.
Within the model, potential evapotranspiration was computed by Penman-Monteith method
coupling with EPIC model (simplified plant growth model). On the basis of the simulated time
series of daily runoff, land-use change effects on spatio-temporal change patterns of runoff
coefficients and runoff modules, and rainfall-runoff relationship, the sensitivity of rainfall-runoff
relationship to rainfall for different types of land use, and impact of land-use patterns on
rainfall-runoff relationships were investigated. The results revealed that under the same condition
of soil texture and terrain slope the advantage for runoff generation and the sensitivity of
rainfall-runoff relationship to rainfall descended by farmland, paddy field, woodland. With the
same rainfall, the advantage for runoff generation ascended by 1990’s, 2000’s and 1980’s land-use
patterns. The outputs could provide important references for soil and water conservation and river
health protection in the upper stream of Huaihe river. |
| Language: | English |
| Keywords: | upper stream of Huaihe River; SWAT model; land-use change; runoff generation characteristics |