基于栅格尺度的穆棱市自然环境适宜性评价研究

以lOOm×100m栅格为基本单元，建立基于地形、气候、水文和地被的自然环境单要素评价模型和自然环境综合评价模型，系统评估了穆棱市自然环境的适宜性与限制性，定量揭示了穆棱市自然环境的地域类型与空间格局。研究表明；穆棱市地形起伏较小，气候偏寒．水文条件一般．地被条件区域差异较大；穆棱市自然环境以适宜性为主要特征，全区自然环境由3／4的适宜区，1／5的临界适宜区和近5％的不适宜区组成；穆棱市人口分布呈现“沿线集聚”的基本特征，全区97．5％以上的人口集中在自然环境适宜地区，2．5％人口分布在自然环境临界适宜地区，基本无居民点处于不适宜地区。

Research on natural environment suitability based on raster data in Muling

Based on 100m×1O0m raster data,choosing terrain,climate,water and landcover condition as the evaluation factors,based on Geographic Information System technique,we set up the single-models,including relief degree of land surface model, temperature and humidity index model,water indexand land cover index model,and comprehensive natural environment index model （NED to evaluatethe natural environment suitability in Muling.The results show that in general Mulingare mainly in places with less relief degree topography,cool climate,general waterconditionandsignificantly differentland cover.Suitability is the main feature of natural environment in Muling.The statistical results shows that in Muling,the percentage of suitable area,critical area and non--suitable area is 75%,20%,and 5%.The basic characteristics of distribution population in Muling is＂along gathering＂. Population distribution at different types of natural environment suitability shows that in Muling More than 97.5% population is concentrated in the areas with natural environment suitability,2.5% population distribution in the the critical areas,almost no settlements in non--suitable areas.