Simulation of Hydrological Response to Land Cover Changes in the Suomo Basin

  • 1. Department of Geography, Nantong Normal College, Nantong 226007, China;
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China

Received date: 2002-05-10

  Revised date: 2002-09-27

  Online published: 2003-01-25

Supported by

Knowlege Innovation Project of Chinese Acdemy of Sciences, No.KZCX2-310; No.KZCX-Y-02


In order to study the effects of land cover changes on hydrology, the TOPMODEL was tested for the Suomo basin on the upper reaches of the Yangtze River. A modified version of the model was used to adapt to the basin condition and data availability. The model was calibrated with five year measured daily discharge record (1980-1984) and the parameters were estimated. With this model and the maps of land cover of the 1970s, the 1980s and the 1990s, daily discharge from 1960 to 1999 was simulated. Comparing simulated discharge with the measured records from 1960 to 1999 in percentage efficiency, the model gave a sound result. After that, simulation was conducted under four land cover scenarios with the tested model. The main results were as follows: With the increase in land cover and interception capability, the basin interception evaporation increased, transpiration and soil evaporation decreased, and overall evaporation increased. Soil moisture increased and saturation zone storage and basin water storage decreased with the increase in land cover and maximum interception capability. Surface runoff and stream discharge decreased and subsurface runoff increased with the increase in land cover at the beginning while decreased with further land cover increase. The degree of hydrological effects of land cover increase depends on the difference value between actual evapotranspiration and potential evaporation.The bigger difference, the higher effects of land cover changes on basin hydrology are.

Cite this article

DENG Huiping, LI Xiubin, CHEN Junfeng, ZHANG Ming, WAN Hongtao . Simulation of Hydrological Response to Land Cover Changes in the Suomo Basin[J]. Acta Geographica Sinica, 2003 , 58(1) : 53 -62 . DOI: 10.11821/xb200301007


[1] Li Wenhua. A sunmmary and perspective of forest vegetation impacts on water yield. Journal of Natural Resources, 2001, 16(5): 398-405.
[李文华. 森林对径流影响的回顾与展望. 自然资源学报, 2001, 16(5): 398-405.]

[2] Shirong. Hydrological functions of forest vegetation in upper reaches of the Yangtze River. Journal of Natural Resources, 2001, 16(5): 457-461.
[刘世荣. 长江上游森林植被水文功能研究. 自然资源学报, 2001, 16(5): 457-461.]

[3] Ma Xuehua. Study on hydrologic function of fir forest in Miyaluo region of Sichuan. Scientia Silvae Sinica, 1987, 23(3): 253-264.
[马雪华. 四川米亚罗地区高山冷杉林水文作用的研究. 林业科学, 1987, 23(3): 253-264.]

[4] Deng Huiping, Li Xiubin, Zhang Ming et al. A study of changes in hydrology resulting from climate and land cover changes in the Suomo Basin. Scientia Geographica Sinica, 2001, 21(6): 493-497.
[邓慧平, 李秀彬, 张明 等. 梭磨河流域降水与地表覆被变化水文效应分析. 地理科学, 2001, 21(6): 493-497.]

[5] Beven K J. A physically based, variable contributing area model of basin hydrology. Hydrol. Sci. Bull., 24(1): 43-69.

[6] Hornberger G M, Beven K J, Cosby B J et al. Sheandoah watershed study: calibration of a topography-based, variable contributing area hydrological model to a small forested catchment. Water Resources Research, 1985, 21(12): 1841-1850.

[7] Beven K J. Rainfall-Runoff Modelling. New York: John Wiley & Sons, Ltd., 2000. 187-200, 208-213.

[8] Quinn, P F, Beven K J, Lamp R. The ln(a/tan) index: how to calculate it and how to use it within the TOPMODEL framework. Hydrological Process, 1995, 9(2): 161-182.

[9] Wolock D M, McCsbe Q J. Comparison of single and multiple flow direction algorithms for Computing topographic parameters in Topmodel. Water Resources Research, 1995, 31(5): 1315-1324.

[10] Wolock D M, Price C V. Effects of digital elevation model and map scale and data resolution on a topography-based watershed model. Water Resources Research, 1994, 30(11): 3041-3052.

[11] Deng Huiping, Li Xiubin. Relationship of upslope contribution area and soil water contentin TOPMODEL. Progress in Geography, 2002, 21(2): 103-110.
[邓慧平, 李秀彬. 地形指数的物理意义分析. 地理科学进展, 2002, 21(2): 103-110.]

[12] Gao Guodong, Lu Yurong. Radiation and heat balance of land surface in China. Beijing: Science Press, 1982. 42-46.
[高国栋, 陆渝蓉. 中国地表面辐射平衡与热量平衡. 北京: 科学出版社, 1982. 42-46.]