| 融合地形和土壤特征的流域蓄水容量模型 |
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| 引用本文： | 向小华,宋琪峰,陈喜,吴晓玲,王船海.融合地形和土壤特征的流域蓄水容量模型[J].水科学进展,2013,24(5):651-657. |
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| 作者姓名： | 向小华 宋琪峰 陈喜 吴晓玲 王船海 |
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| 作者单位： | 1.河海大学水文水资源与水利工程科学国家重点实验室, 江苏南京 210098; |
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| 基金项目： | 国家自然科学基金资助项目(51190091;41201030) |
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| 摘 要： | 以van Genuchten模型表述的土壤水分特征曲线为基础,推导出流域单点缺水量,并结合TOPMODEL模型中地形指数与地下水位关系,建立了反映地形和土壤特征共同影响的蓄水容量模型,通过统计方法从栅格尺度蓄水容量获得流域尺度蓄水容量曲线,取代传统新安江模型中率定的蓄水容量曲线。以淮河流域紫罗山子流域为例,分析地形特征与土壤类型对蓄水容量的影响;并与实测流量过程以及原新安江模型模拟的流量过程对比,表明模型能较好地模拟场次洪水过程。模型将蓄水容量曲线显式表述,减少了新安江模型参数,为无资料地区的水文模拟提供了分析方法。
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| 关 键 词： | 分布式算法 土壤含水量 蓄水容量 土壤水分特征曲线 |
| 收稿时间： | 2012-12-27 |
A storage capacity model integrating terrain and soil characteristics |
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| XIANG Xiaohua,SONG Qifeng,CHEN Xi,WU Xiaoling,WANG Chuanhai.A storage capacity model integrating terrain and soil characteristics[J].Advances in Water Science,2013,24(5):651-657. |
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| Authors: | XIANG Xiaohua SONG Qifeng CHEN Xi WU Xiaoling WANG Chuanhai |
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| Institution: | 1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;2.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China |
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| Abstract: | The deficit in soil moisture or soil moisture storage capacity for a particular point is estimated based on the van Genuchten soil water characteristic curve model. The deficit is then used together with the relationship between the depth to groundwater table and the TOPMODEL topographic index in the development of a watershed storage capacity model taking into account the effect of soil properties and topography. Based on statistical analysis of the storage capacity of each grid point, the watershed storage capacity curve can be obtained. The watershed-scale capacity curve is used to replace the calibrated storage capacity curve of the traditional Xin'anjiang model. The Ziluosha sub-basin of Huaihe River basin is chosen as a test site to validate the new model and to study the influence of terrain and soil types on the watershed storage capacity. Results show that the new model can better simulate the event-based flood hydrograph compared to that obtained with the traditional Xin'anjiang model. The use of an explicit formula for the storage capacity in the new model reduces the number of user calibrated parameters in the traditional Xin'anjiang model, which provides a new tool for hydrological simulation in ungauged basins. |
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| Keywords: | distributed algorithms soil moisture water content soil water characteristic curve |
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