| 不同子流域划分对流域径流、泥沙、营养物模拟的影响——丰乐河流域个例研究 |
| |
| 引用本文： | 胡连伍,王学军,罗定贵,蒋颖.不同子流域划分对流域径流、泥沙、营养物模拟的影响——丰乐河流域个例研究[J].水科学进展,2007,18(2):235-240. |
| |
| 作者姓名： | 胡连伍 王学军 罗定贵 蒋颖 |
| |
| 作者单位： | 北京大学环境学院, 地表过程分析与模拟教育部重点实验室, 北京, 100871 |
| |
| 基金项目： | 国家自然科学基金;高等学校优秀青年教师教学科研奖励计划 |
| |
| 摘 要： | 以丰乐河流域为研究对象,选用SWAT2000模型定量化研究不同子流域划分层次对模型模拟结果的影响,得到结论:①不同的子流域划分层次在阈值范围内对径流过程的影响较小,而对泥沙、营养物的影响较大;②就本流域而言,子流域划分层次对模拟结果的影响存在上限、下限两个阈值,高于上限,出现模拟失真,低于下限,尽管可通过调参获得满意结果,但难以满足流域规划与管理对空间数据的要求,阈值的确定与具体的流域特征有关;③就本流域而言,当子流域划分数量比较少时,出口泥沙响应的敏感性高于总磷、总氮;当子流域划分数量比较多时,出口泥沙响应的敏感性要低于总磷、总氮。
|
| 关 键 词： | 分布参数集总 模型结构 子流域划分 SWAT2000 |
| 文章编号： | 1001-6791（2007）02-0235-06 |
| 收稿时间： | 2005-11-20 |
| 修稿时间： | 2006-04-10 |
Effect of sub-watershed partitioning on flow, sediment and nutrient predictions: Case study in Fengle river watershed |
| |
| HU Lian-wu,WANG Xue-jun,LUO Ding-gui,JIANG Ying.Effect of sub-watershed partitioning on flow, sediment and nutrient predictions: Case study in Fengle river watershed[J].Advances in Water Science,2007,18(2):235-240. |
| |
| Authors: | HU Lian-wu WANG Xue-jun LUO Ding-gui JIANG Ying |
| |
| Institution: | College of Environmental Sciences, Peking University, Beijing 100871, China |
| |
| Abstract: | Input data aggregation is a common method for representing watersheds in the distributed-parameter models.To integrate a number of simpler process-based sub-models derived at different scale is one way to build distributed hydrological models.Both the spatial aggregation of watershed information and the model structure have significant impacts on the model output.This study investigated how different watershed partitioning affect flow,sediment and nutrient quantitatively using SWAT2000.The conclusions are:(1) Annual sediment yield and nutrients predictions are highly sensitive to the number of sub-basins used to represent a watershed,but runoff is not.(2) There're two thresholds for model output response.Below the lower threshold,although we can also get reasonable results by calibration,it might not fulfill the spatial demand for environmental management and programming.Above the higher threshold,distortional output may occur.The determination of the thresholds depends on the actual watershed characteristic.And(3) the sensitivity of sediment is bigger than TN and TP to the number of sub-watersheds when few subwatershed is partitioned,and smaller than TN and TP when more subwateshed is partitioned. |
| |
| Keywords: | SWAT2000 |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
| 点击此处可从《水科学进展》下载免费的PDF全文 |
|
