崇仁河流域水土流失时空变化规律分析

通过专家模型提取1995年、1998年和2000年3个时期遥感影像的水土流失区，结合地理信息系统研究崇仁河流域水土流失时空演变规律。研究结果表明，崇仁河流域水土流失虽然近两年有所改善但仍很严重。原因是研究区月平均气温高，雨量充沛，岩石岩性以紫红、砖红色砂砾岩为主，地层构造不发育，土壤肥力差，植被生长困难，再加上人类活动频繁，以及不合理利用土地资源，使本来就易受侵蚀的土壤流失更迅速。同时，针对本区水土流失的特殊性，提出了合理保持水土的措施。

Spatial and Temporal Changes of Soil Erosion in Chongren Drainage Area in Jiangxi province

The spatial and temporal changes of soil erosion is studied by automatically extracting three periods of soil and water loss area in Chongren drainage area in 1995,1998 and 2000.The combination of the remote sensing technique with the geographic information system technique showes significant advantages in the research. The result showes that Chongren drainage area soil and water loss is very serious although becoming gradually less in this two years. The soil and water loss which corrades easily becomes faster because of high air temperature, precipitation rain fall, violet red and brick red sandstone, undeveloped formation structure, bad fertility and little vegetation, and frequent and irrational human activity, etc. And at the same time, in allusion to particularity of this soil and water loss, a rational suggestion is put forward.