怒江峡谷人居环境适宜性评价及容量分析

Capacity Analysis and Suitability Evaluation of Habitat Environment in Nujiang Canyon

高山峡谷地区山高坡陡,其发展受到很多因素的限制,人居环境有其特殊性。怒江峡谷区人居环境的主要影响因子为：海拔、坡度、坡向、交通、水资源、土地利用等。将指标分级量化后,采用GIS的空间叠置分析、缓冲区分析等空间分析技术,对研究区人居环境适宜性进行了定量、定位综合评价分析。研究表明,怒江峡谷人居环境适宜区域主要以带状形式分布在河流两侧,其他区域只有零星分布;怒江峡谷人居环境状况与社会经济发展状况的空间分布基本吻合,各县人居环境评价均值与农民人均纯收入相关性达到0.96,各乡人居环境评价均值与农民人均纯收入相关性达到0.76。同时分析了怒江峡谷三县各乡镇的人居环境容量,表明其环境难以承载现有人口。

In alpine canyon area,its slope is steep and its development is restricted by many factors,human settlement has its particularity.Habitat environment is not only a geographical space that is related closely to human survival activities,but also the material basis of human survival and development.The appropriate living environment is the most important safeguard to build new countryside in China.The article explored the main factors impacting living environment of Nujiang canyon,and these factors are considered as major evaluation indicators to evaluate Nujiang canyon habitat environment.Combining the regional characteristics,the main influence factors of Nujiang valley habitat environment include： elevation,slope,aspect,transportation,water resources,land use,soil quality.After quantifying and grading of the indicators,GIS spatial analysis technology was used,such as overlay of space,analysis of the buffer zone,to make a comprehensive evaluation of quantitative and position for habitat environment adaptability of the study area.Research shows that the region that is suitable for living is distributed mainly around the river in the form of a strip;other regions have sporadic distribution.The state of Nujiang＇s habitat environment is essentially consistent with the spatial distribution of socio-economic development.The correlation between the value of habitat environmental evaluation and county farmers＇ per capita net income reach to 0.96.The correlation between the value of habitat environmental evaluation and township farmers＇ per capita net income reach to 0.76.Meanwhile,by analyzing the living environment capacity of three counties,Nujiang Canyon,indicate that it is difficult for environment to carry its current population.