| Impact of Land-use Patterns on Distributed Groundwater Recharge and Discharge——A Case Study of Westem Jilin, China |
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| 摘 要： |
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| 关 键 词： | 吉林 地下水 土地利用 生态系统 |
| 收稿时间： | 2006-01-16 |
| 修稿时间： | 2006-06-17 |
Impact of land-use patterns on distributed groundwater recharge and discharge |
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| Authors: | Moiwo Juana Paul |
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| Institution: | (1) College of Environment and Resources, Jilin University, Changchun, 130012, China |
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| Abstract: | The impact of land-use on distributed groundwater recharge and discharge in the western Jilin (WJ) was analyzed in this study.
WJ is a transitional, semi-arid zone with a fragile, hydrological closed ecosystem in the Songhua River Basin (SRB). The research
tool includes a seamlessly linked MODFLOW, WetSpass, the Seepage packages, and ArcGIS. The model calibration showed good agreement
between simulated water table elevation and measured water table depths, while predicted groundwater discharge zones showed
strong correlations with field occurrences of drainage systems and wetlands. Simulated averages for distributed recharge,
water table elevation and groundwater drawdown were 377.42mm/yr, 194.43m, and 0.18m respectively. Forest vegetation showed
the highest recharge, followed by agricultural farmlands, while open-water and other drainage systems constituted groundwater
exit zones. When present land-use conditions were compared with the hypothetical natural pre-development scenario, an overall
loss of groundwater recharge (24.09mm/yr) was observed, which for the project area is 18.05 × 108m3. Groundwater abstraction seemed to be the cause of water table drawdown, especially in the immediate vicinities of the supply
wells. An important issue of the findings was the ability of the hypothetical forest vegetation to protect, and hence sustain
aquifer reserves and dependent ecosystems. The profound data capture capability of ArcGIS makes it particularly useful in
spatio-temporal hydroecological modeling.
Biography: Moiwo Juana PAUL (1967–), male, a native of Sierra Leone of West Africa, Ph.D. candidate, specialized in wetland
ecology. |
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| Keywords: | land-use ecosystem groundwater recharge discharge Western Jilin |
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