WEPP模型在东北黑土区的适用性评价——以坡度和水保措施为例

被引:13
作者
刘远利 [1 ]
郑粉莉 [1 ,2 ]
王彬 [1 ]
王玉玺 [3 ]
解运杰 [3 ]
樊华 [3 ]
机构
[1] 西北农林科技大学资源环境学院
[2] 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
[3] 黑龙江省水土保持研究所
关键词
WEPP; 东北黑土区; 径流量; 土壤侵蚀; 适用性;
D O I
10.13961/j.cnki.stbctb.2010.01.028
中图分类号
S157 [水土保持];
学科分类号
0815 ; 082802 ; 090707 ; 0910 ;
摘要
基于黑龙江省宾县试验站2008年气象观测数据和野外径流小区监测资料,利用WEPP模型估算东北黑土区次降雨径流量和土壤流失量,并通过与实测资料对比,评价WEPP模型的适用性。结果表明,在3°,5°,8°这3个坡度条件下,WEPP模型对次降雨径流量模拟的Nash—Sutcliffe有效性系数ME分别为0.47,0.03和-5.9,对次降雨土壤侵蚀量模拟的Nash—Sutcliffe有效性系数ME分别为0.58,0.72和0.60,说明WEPP模型对次降雨坡面径流量的模拟效果较差,而对次降雨坡面土壤侵蚀量模拟效果较好。WEPP模型对次降雨的径流量和土壤流失量的模拟显示,WEPP模型对坡度变化反应敏感。WEPP模型对大豆、稗草、苜蓿和苗期榆树次降雨径流量模拟有效性系数ME分别为0.81,0.71和0.83,0.94,对次降雨土壤流失量的模拟有效性系数ME分别为0.81,0.71和0.83,0.94,表明WEPP对大豆地和苜蓿地的模拟效果好于稗草和苗期榆树,且其好于不同坡度条件下裸地的模拟结果。WEPP模型可以模拟不同水保措施条件下的次降雨径流量和土壤侵蚀量,也可以模拟不同坡度条件下裸地的次降雨土壤侵蚀量,但是不适合模拟不同坡度条件下裸地的次降雨径流量。
引用
收藏
页码:139 / 145
页数:7
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