| Research Articles |
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| Hydrological response to land use and land cover changes in a sub-watershed of West Liaohe River Basin, China |
| XiaoLi YANG1, LiLiang REN1* , Yi LIU1, DongLai JIAO2, ShanHu JIANG1 |
1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;
2 College of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing 210046, China |
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Abstract In recent years, the streamflow of the Laohahe Basin in China showed a dramatic decrease during the rainy season as a result of climate change and/or human activities. The objective of this work was to document significant streamflow changes caused by land use and land cover (LULC) changes and to quantify the impacts of the observed changes in Laohahe Basin. In the study area, the observed streamflow has been influenced by LULC changes, dams, and irrigation from rivers, industry, livestock and human consumption. Most importantly, the growth of population and gross domestic product (GDP) accompanied by the growth in industrial and agricultural activities, which led to LULC changes with increased residential land and cropland and decreased grassland since 2000s. Statistical methods and Variable Infiltration Capacity (VIC) hydrological model were used to estimate the effects of climate change and LULC changes on streamflow and evaportranspiration (ET). First, the streamflow data of the study area were divided into three sub-periods according to the Pettitt test. The hydrological process was then simulated by VIC model from 1964 to 2009. Furthermore, we compared the simulated results based on land use scenarios in 1989, 1999 and 2007, respectively for exploring the effect of LULC changes on the spatio-temporal distribution of streamflow and ET in the Laohahe Basin. The results suggest that, accompanied with climate change, the LULC changes and human water consumption appeared to be the most likely factors contributing to the significant reduction in streamflow in the Laohahe Basin by 64% from1999 to 2009.
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Received: 29 September 2013
Published: 10 December 2014
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| Fund: This work was financed by the National Natural Science Foundation of China (41201031), the Special Basic Research Fund for Methodology in Hydrology of Ministry of Sciences and Technology, China (2011IM011000), the Innovative Research Team Project of Basic Research Funds for National University at State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering (2009585412), the 111 Project of Ministry of Education and State Administration of Foreign Experts Affairs, China (B08048), and the National Key Technology R&D Program by Ministry of Sciences and Technology, China (2013BAC10B02). |
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