川西北沙化土地动态分析评价及其治理对策

Dynamic analysis and assessment on north-west desertification land of Sichuan province

根据野外调查、监测与遥感解译,结合前人研究资料,论述了对川西北地区沙化土地的监测情况,分析了其沙化原因,川西北土地沙化有自然因素和人为因素2个方面。自然因素包括地貌条件,岩性,新构造运动与地下水变化,气候变化,水文及第四纪冰川活动影响,鼠虫害。人为因素包括草地超载放牧,开渠排水,草地不合理利用,乱采滥挖,针对川西北土地沙化的影响因素,提出了相应的治理对策。这对青藏高原生态环境研究及长江上游地区土地沙漠化的防治有着极其重要的意义。

Based on the data of field investigation,monitoring and remote interpretation and referring to the data researched by predecessors,the monitoring condition of land desertification of north-west area of Sichuan province is presented and the desertification cause is analyzed.The desertification of north-west area of Sichuan province contains artificial factors and natural factors.The natural factors are geomorphy,rock feature,new tectonic movement,the variations of ground water and climate,hydrology and the influence of Quaternary glacier action,rat harm.The artificial causes are over grazing,channelling for drainage,unreasonable utilization of grassland,disorderly gathering and digging.In the light of influence factors of land desertification of north-west area of Sichuan province,the correspondent countermeasures are suggested.The research achievements possess important significance to ecological research of Qinghai-Tibet plateau and the control of land desertification of upstream area of the Yangtze river.