首都圈典型区土地退化的原因分析

 根据野外工作,在地理信息系统和遥感技术的支持下,探讨以防止风蚀为目的的首都圈的范围及主要特征,着重分析首都圈典型地区土地退化的机制、分布状况和防治的季节。结果表明,土地退化的主要原因是近年持续干旱少雨,土地利用的强度过大,以及在干旱季节里没有适当的防护措施等。建议采用适宜于首都圈的封育和垄耕等防治措施。

Analysis on Land Degradation in the Typical Areas in the Regions near the Capital

Based on field investigation and information by GIS and RS, the study attempts to analysie the location and characteristics of the regions near the Capital of China for the prevention of wind erosion. It also studies the causes, distribution and pivotal preventing times of the degraded land. The results show that the major reason for the land degradation is constant aridity such as shortage of rain, excessive use of land, and shortage of protection measures in dry seasons. It is suggested to accept measures suitable to the regions, such as fencing for recovering and rehabilitation and staggered furrows, etc .