Water Science and Engineering 2008, 1(3) 44-53  DOI:   10.3882/j.issn.1674-2370.2008.03.005   ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
water balance analysis
distributed hydrological model
SWAT model
Xitiaoxi catchment
Taihu Lake
Authors
Li-juan XUE
Li-jiao LI
Qi ZHANG
PubMed
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Article by
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Hydrological behaviour and water balance analysis for Xitiaoxi catchment of Taihu Basin

Li-juan XUE1,2, Li-jiao LI1, 3, Qi ZHANG*1

1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
2. Haihe River Commission, Ministry of Water Resources, Tianjin 300170, P. R. China
3. Graduate University of Chinese Academy of Sciences, Beijing 100039, P. R. China

Abstract

With the rapid social and economic development of the Taihu region, Taihu Lake now faces an increasingly severe eutrophication problem. Pollution from surrounding catchments contributes greatly to the eutrophication of water bodies in the region. Investigation of surface flow and associated mass transport for the Xitiaoxi catchment is of a significant degree of importance as the Xitiaoxi catchment is one of the major catchments within the Taihu region. A SWAT-based distributed hydrological model was established for the Xitiaoxi catchment. The model was calibrated and verified using hydrometeorological data from 1988 to 2001. The results indicate that the modeled daily and annual stream flow match the observed data both in the calibration period and the verification period, with a linear regression coefficient R2 and a coefficient e for modeled daily stream flow greater than 0.8 at Hengtangcun and Fanjiacun gauge stations. The results show that the runoff process in the Xitiaoxi catchment is affected both by rainfall and human activities (e.g., reservoirs and polder areas). Moreover, the human activities weaken flood peaks more noticeably during rainstorms. The water balance analysis reveals the percentages of precipitation made up by surface flow, evapotranspiration, groundwater recharge and the change of soil storage, all of which are considered useful to the further understanding of the hydrological processes in the Xitiaoxi catchment. This study provides a good base for further studies in mass transport modeling and comparison of modeling results from similar hydrological models.

Keywords water balance analysis   distributed hydrological model   SWAT model   Xitiaoxi catchment   Taihu Lake  
Received 2008-08-07 Revised 2008-08-03 Online:  
DOI: 10.3882/j.issn.1674-2370.2008.03.005
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Corresponding Authors: Qi ZHANG
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