首页 | 本学科首页   官方微博 | 高级检索  
     检索      

水蚀风蚀交错区典型流域景观格局变化对土壤侵蚀过程的影响
引用本文:马瞳宇,张晓萍,孙艳萍,马芹,雷泳南,徐金鹏,张庆印.水蚀风蚀交错区典型流域景观格局变化对土壤侵蚀过程的影响[J].水土保持学报,2012,26(4):43-48,53.
作者姓名:马瞳宇  张晓萍  孙艳萍  马芹  雷泳南  徐金鹏  张庆印
作者单位:1. 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌,712100
2. 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100/中国科学院水利部水土保持研究所,陕西杨凌712100
基金项目:国家自然科学基金项目(41101265);黄土高原土壤侵蚀与旱地农业国家重点实验室专项(10502-Z12-1)
摘    要:流域土壤侵蚀过程与景观格局的关系是评价流域景观格局合理性的关键问题。以GIS软件为分析平台,以最新提出的"源""汇"景观理论为基础,以水蚀风蚀交错区典型流域——六道沟流域1995,2010年土地利用/覆被格局为分析对象,以淤地坝淤积量作为土壤侵蚀监测信息,利用景观空间负荷对比指数分别分析了这2个时期各景观类型随空间要素配置、贡献权重和组成比例对土壤侵蚀过程的影响,最后对该指数的变化与土壤侵蚀模数的变化进行相关性分析。结果表明:2010年与1995年相比,六道沟流域各集水区的相对高度、坡度、投影距离、运移距离负荷对比指数均呈减小趋势,景观格局分布更加合理,水土流失危险性降低,与同期土壤侵蚀模数变化趋势相同。坡度负荷对比指数增量与土壤侵蚀模数增量相关性较弱,相对高度、投影距离、运移距离负荷对比指数增量与土壤侵蚀模数增量呈显著正相关,运移距离负荷对比指数反映土壤侵蚀过程对景观格局变化响应的效果最好。景观格局负荷对比指数与土壤侵蚀实测值之间均存在较大差异,应进一步改进模拟方法以达到准确量化的目标。坡度负荷对比指数不能很好地解释景观格局对土壤侵蚀过程的影响,需要在坡度取值方式上加以改进。

关 键 词:景观格局  土壤侵蚀  “源”“汇”景观  景观空间负荷对比指数  水蚀风蚀交错区

Influences of Landscape Pattern Change to Soil Erosion Process in Water-Wind Erosion Crisscross Region,Loess Plateau
MA Tong-yu,ZHANG Xiao-ping,SUN Yan-ping,MA Qin,LEI Yong-nan,XU Jin-peng,ZHANG Qing-yin.Influences of Landscape Pattern Change to Soil Erosion Process in Water-Wind Erosion Crisscross Region,Loess Plateau[J].Journal of Soil and Water Conservation,2012,26(4):43-48,53.
Authors:MA Tong-yu  ZHANG Xiao-ping  SUN Yan-ping  MA Qin  LEI Yong-nan  XU Jin-peng  ZHANG Qing-yin
Institution:1(1.State Key Laboratory of Soil Erosion and Dry Land Farming in Loess Plateau, Northwest A & F University,Yangling,Shaanxi 712100;2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100)
Abstract:To study the responses of soil erosion process to landscape pattern change in water-wind erosion crisscross region,Loess Plateau,China,location-weighted landscape contrast index(LLI) was used to analyze influences of landscape change with configuration of spatial elements,contribution weight and composition to soil erosion processes in Liudaogou watershed,and finally the index change and soil erosion modulus change was calculated in the correlation analysis.Location-weighted landscape contrast index was based on "source-sink" theory and land use/cover in 1995 and 2010,and was mapped in GIS software.Amount of sediment in warping dam land was obtained as soil erosion monitoring information.The results show that: The LLI in Liudaogou watershed showed decreasing trend and distribution of landscape pattern became more reasonable in 2010,compared with 1995.The risk of soil erosion reduced and soil erosion modulus over the same period showed the same trend.The LLI(flow length) increment which reflected changes in the landscape pattern better were significantly negatively related to the soil erosion modulus increment.Other LLI(relative height,slope,and projection distance) increment was weak correlation with soil erosion modulus increment and the trends were quite different to the measured value.This simulation method should be further improved in order to achieve accurate quantification.
Keywords:landscape pattern  soil erosion  "source-sink" landscape  location-weighted landscape contrast index  water-wind erosion crisscross region
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号