黄土高原植被作用下黄河数字流域模型坡面侵蚀模块改进

被引：6

作者：

王晨沣

傅旭东

张玍

龚正

覃超

机构：

[1] 清华大学水沙科学与水利水电工程国家重点实验室

来源：

清华大学学报(自然科学版) | 2022年 / 62卷 / 12期

基金：

国家重点研发计划;

关键词：

植被; 土地利用; 侵蚀模型; 土壤分离; 泥沙输移; 黄土高原;

D O I：

10.16511/j.cnki.qhdxxb.2022.22.014

中图分类号：

S157.1 [水土流失的原因及其防治];

学科分类号：

摘要：

植被是影响坡面侵蚀的重要因素，如何在基于物理机制的侵蚀产沙过程中考虑植被作用仍是目前亟需解决的关键问题。该文基于土壤分离能力与泥沙输移能力双重限制的坡面侵蚀产沙机制，建立了考虑植被作用的坡面侵蚀模型。采用黄土高原典型流域径流小区数据对所建模型进行验证，结果表明：不同土地利用下该模型的决定系数为0.84～0.94, Nash-Sutcliffe有效系数为0.83～0.93,相对误差为-16.1%～14.2%。与黄河数字流域模型现有坡面侵蚀模块(决定系数0.01～0.51, Nash-Sutcliffe有效系数-74.45～0.48)相比，该文所建立的模型明显改善了不同土地利用和植被作用下的侵蚀产沙过程模拟，模拟产沙量的相对误差绝对值降低13%～96%,还具有与分布式流域水沙模型集成和应用的潜力。

引用

页码：1953 / 1963

页数：11

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