农业工程学报2011，Vol.27Issue(10)：192-198,7.DOI:10.3969/j.issn.1002-6819.2011.10.034
东北黑土区沟蚀现状及其与景观格局的关系
Gully status and relationship with landscape pattern in black soil area of Northeast China
摘要
Abstract
The regulation of land use structure, improvement on quantity proportion of landscape constituent and optimization of the landscape patch spatial distribution are the important measures to control erosion. Taking Kedong county in typical black soil area of Northeast China as study area, using SPOT5 image as basic data source, gully distribution status and landscape pattern were obtained for the study area. Based on hydrology analysis module, 55 subbasins were extracted as basic analysis units, then gully density and landscape pattern metrics in each subbasin were gotten using GIS spatial function and FRAGSTAT software, respectively. By correlation analysis, the relationship between gully erosion and landscape pattern was analyzed. The results showed that the number of gully is 2 246. The shortest and longest gully was 19.7 m and 12 499.43 m, respectively. Gully density is 479.15 m/km2. The erosion area ofcultivated land was 1 734.05 hm2 and the area of destroyed cultivated land was 8 067.5 hm2. The study area is a typical matrix-patch-corridor agriculture landscape and the high factitious dry land is the main reason to cause erosion . Single-factor correlation analysis between gully density and percentage of landscape (PLAND) of dry land, forest, Perimeter-Area Fractal Dimension (PAFRAC), Contagion Index (CONTAG), and Shannon's Diversity Index (SHDI) showed that regulating the percents in dry land, grass and forest and optimizing the landscape configuration reasonably were very important for the soil erosion control and management. Multi-factor correlation analysis between gully density and landscape metrics showed that the difference of landscape pattern in subbasin was not the key reason that caused the difference of gully erosion, and therefore, research on gully formation need to integrate natural and human activities factors for further study. The research can provide suggestion for land use planning and soil erosion control in agriculture landscape.关键词
沟蚀/侵蚀沟密度/东北黑土区/景观指数Key words
soils/ erosion/ geographic information systems/ gully density/ Black Soil Area of Northeast China/ landscape metrics分类
农业科技引用本文复制引用
王文娟,张树文,邓荣鑫..东北黑土区沟蚀现状及其与景观格局的关系[J].农业工程学报,2011,27(10):192-198,7.基金项目
国家自然科学基金项目(40771162) （40771162）
