摘要
该研究以平凉市纸坊沟流域为例,应用双累积曲线法,分析界定了流域1981-1997年大规模水土流失综合治理环境下土壤侵蚀变化出现差异特征的时间段。研究结果表明:1981-1997年流域水土流失及治理措施变化剧烈的分水岭年份为1985-1986年。1985年以后,随着治理面积的逐年增加,综合治理程度的提高,明显改善了流域降雨、径流和输沙的关系。同时分析得出流域降水、径流、治理程度与土壤侵蚀流失具有一定的线性回归相关关系。
Through the application of double summation curve,Zhifanggou watershed of Pingliang City was chosen as a research site to analyze the periods of discrepancy appearance of soil erosion character under the background of large-scale comprehensive water loss and soil erosion treatment from1981 to 1997.The result indicated that soil and water loss condition and treatment changed sharply in 1985.Owing to the increase of treated area and the enhancement of comprehensive management extent,the relationship amongst precipitation,runoff and transported sand has been improved obviously since 1985.Meanwhile,It is also found that there is linear correlation between precipitation,discharge,treatment extent and soil erosion loss at a certain extent.
出处
《水资源与水工程学报》
2012年第6期100-103,共4页
Journal of Water Resources and Water Engineering
基金
兰州大学中央高校基本科研业务费专项资金资助(lzujbky-2012-142)
关键词
土壤侵蚀
径流量
输沙量
纸坊沟流域
soil erosion
runoff
sand transport rate
Zhifanggou watershed
