土壤分离能力测定的不确定性分析

被引：20

作者：

张光辉 ^{[1
,2
]}

机构：

[1] 北京师范大学地表过程与资源生态国家重点实验室

[2] 北京师范大学地理科学学部

来源：

水土保持学报 | 2017年 / 02期

基金：

国家自然科学基金重点项目;

关键词：

土壤侵蚀; 水土保持; 预报模型; 坡面径流; 试验水槽;

D O I：

10.13870/j.cnki.stbcxb.2017.02.001

中图分类号：

S157.1 [水土流失的原因及其防治];

学科分类号：

0815 ; 082802 ; 090707 ; 0910 ;

摘要：

土壤分离能力是含沙量为零时坡面径流分离土壤的最大值,是确定细沟可蚀性和土壤临界剪切力的基础,也是土壤侵蚀过程模型推广应用的前提,因此,对其准确测量非常关键。在系统分析野外坡面径流小区无法测定土壤分离能力的基础上,从室内试验水槽的类型与规格、土样采集的代表性、测试样品的长度、扰动程度、初始土壤含水量及土样冲刷时间等方面,系统讨论了它们对土壤分离能力的潜在影响与机制,探讨了土壤分离能力测定过程中的不确定性。对深刻理解土壤侵蚀过程的动力机制、选择合理的土壤分离能力测定方法与试验过程,具有重要的指导意义。

引用

页码：1 / 6

页数：6

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