ZHU Jing,ZHAO Wen-wu,XU Hai-yan.The Scale Effects of Runoff-Sediment Correlations in the Hilly and Gully Area of the Loess Plateau[J].Research of Soil and Water Conservation,2008,15(03):4-6.
黄土丘陵沟壑区径流输沙相关性的尺度效应分析
- Title:
- The Scale Effects of Runoff-Sediment Correlations in the Hilly and Gully Area of the Loess Plateau
- Keywords:
- hilly and gully area of the Loess Plateau; runoff; sediment; correlations; model
- 分类号:
- S157.1
- 摘要:
- 以陕北黄土丘陵沟壑区延河、清涧河、汾川河3条流域作为研究区域，针对该区9个水文站点的6-9月径流量、输沙量的数据，探讨了时空尺度变化对径流与输沙相关性的影响。结果表明二者在不同的时间尺度和空间尺度上其相关程度差异明显。基于径流因子与输沙因子的关系所拟合的曲线模型中，7，8月份的模型拟合优度在整体上高于6月、9月，汛期的模型拟合优度一般低于7，8月份的模型拟合优度。汛期清涧河流域的模型拟合优度高于延河和汾川河流域，区域的模型拟合优度高于延河和汾川河流域，但略低于清涧河流域。
- Abstract:
- In order to explore the scale effects of correlations between runoff and sediment in the hilly and gully area of the loess plateau,this paper took the Yanhe watershed,Qingjianhe watershed and Fenchuanhe watershed in northern of Shaanxi province as a case study,and analyzed the relationship between the monthly runoff volume and sediment discharge rate from 15 years in 9 hydrological stations.It is implied from the analysis result that the correlation coefficient of runoff and sediment varies for different time scales and spatial scales.And the goodness of fitting models for runoff and sediment changes with scale alteration.At for time scale,the fitting goodness of models in July and August are higher than that in June and September,and the flood seasons are better than that of July and August.As for the spatial scale,the fitting goodness of model for Qingjianhe watershed is better than that for Yanhe watershed and Fenchuanhe watershed;the regional models is better than that for Yanhe watershed and Fenchuanhe watershed,and worse than that for Qingjianhe watershed.
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备注/Memo
收稿日期:2007-8-9。
基金项目:国土资源部土地利用重点实验室开放基金（07-05）；国家自然科学基金项目（40501002）；“973”计划项目（2007CB106806）
作者简介:朱婧（1984- ），女，河北威县人，硕士研究生，主要从事土地资源管理、土地利用与生态过程的研究。E-mail：zhujing@ires.cn
通讯作者:赵文武（1976- ），男，山东省曹县人，博士，讲师，主要从事土地管理、土地利用与生态过程、GIS与RS应用方面的研究。E-mail：zhaoww@bnu.edu.cn