基于3S技术的祖厉河流域农村人均纯收入空间相关性分析

The spatial relationship analysis of rural per capital revenue based on GIS in Zulihe River basin,Gansu Province

利用3S技术对空间数据的提取和分析能力,获得祖厉河流域内地形、降水等自然数据以及社会经济数据,并对历年来农民人均收入与自然条件、社会经济因素之间的空间相关性进行分析,探讨影响该流域农民收入的主要因素。研究结果表明,祖厉河流域人均收入与各因素的相关性具有明显的时代特征和空间特征。历年来农民人均收入与总产量、单产量、水浇地比例和降水量呈显著的正相关性,表明农业收入始终是农民收入的主要来源,土地生产力是决定农民收入的主要因素。值得注意的是,在雨养农业区人均收入与垦殖率呈显著的负相关,说明以扩大垦殖面积来提高农民收入是一种短期行为,其不仅不能增加农民收益,反而会导致生态环境恶化,加重生态-经济的恶性循环。祖厉河位于黄土高原干旱、半干旱区,水资源是决定土地生产力的关键,因此,在水资源总量有限的情况下,提高水资源利用率以提高土地生产力是提高农民收入的切入点。

In this paper,we obtained the spatial distribution of natural factors（eg,landform,precipitation,） and social-economical factors（as per capital revenue,land products,culture ratio） used GIS.then analysis the relationship between farmer per capital revenue（FPCR） and other facts in order to investigated the influence factor to FPCR.The results demonstrated that the relationship have distinct time and spatal characteristic.The FPCR have obviously positive relationship with crop gross products,unit product,and irrigation rate,precipitation,it show that crop cultivation income always is the main source of FPCR in Zulihe River basin,the cropland products is the determinate factor.Noteworthiness,the noticeably negative relationship of FPCR with reclaim rate indicate that it is a myopia behavior to expand the area of cropland which not only can not enhance the income of farmer but also deteriorate agroecological environment,which will aggravate the so-called vicious circle of ecology-economy.Zulihe River located in the arid and semi-arid region of the Loess Plateau,the water resource is a key factor for elevating land products,so under the condition of limited water resource,and to elevate the utilization ratio of water resource to elevate the land productivity is the breakthrough point for improving the rural revenue.