青藏高原高山峡谷区建设用地和耕地适宜性评价方法及应用——以林芝市为例  

Evaluation method and empirical application of construction land suitability and arable land suitability in alpine-gorge region of Qinghai-Tibet Plateau:Acase study of Nyingchi city

作　　者：杨华 徐勇[1,2] 王丽佳 YANG Hua;XU Yong;WANG Lijia(Key Laboratory of Regional Sustainable Development Modeling,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院地理科学与资源研究所,中国科学院区域可持续发展分析与模拟重点实验室,北京100101 [2]中国科学院大学,北京100049

出　　处：《自然资源学报》2023年第5期1283-1299,共17页Journal of Natural Resources

基　　金：第二次青藏高原综合科学考察研究(2019QZKK0406);国家重点研发计划项目(2018YFD1100101)。

摘　　要：青藏高原是中国乃至亚洲的重要生态屏障区,进行建设用地和耕地适宜性评价对于青藏高原生态保护、严格人类活动空间具有重要意义。针对中国现行建设用地和耕地适宜性评价方法在高海拔地区应用中存在的不足,分别构建了适用于青藏高原高山峡谷区的建设用地和耕地适宜性评价模型,提出了空气密度、坡地适建、气温和土壤抗蚀四个控制参数测算方法;以100 m间隔高程分级和1°间隔坡度分级为基准情景,选择林芝市为典型案例开展实证应用研究,并对两种增大高程和坡度间隔分级情景进行论证。结果表明:(1)林芝市建设用地和耕地适宜性均以不适宜为主体,不适宜区面积占土地总面积比例分别为87.48%和87.42%,欠适宜区比例分别为5.58%和4.58%,适宜、较适宜和一般适宜区的面积之和占比分别仅为6.94%、7.60%;(2)基准情景下建设用地和耕地适宜性评价结果与现状建设用地和耕地的适配效果较好,适配精度分别达到93.59%和90.89%,米林县、巴宜区和波密县的适配精度达到95%以上;(3)情景1和情景2下建设用地适宜性的适配精度与基准情景的误差分别为-0.48%和-2.31%,耕地适宜性的适配精度与基准情景的误差分别为+0.63%和+0.65%,误差处于可接受范围;(4)500 m高程间隔和3°、5°、8°、12°、15°、20°、25°的坡度间隔适用于青藏高原高山峡谷区建设用地和耕地适宜性评价。The Qinghai-Tibet Plateau is an important ecological barrier area in China and Asia.Conducting construction land suitability evaluation(CLSE)and arable land suitability evaluation(ALSE)is important for ecological protection,restriction of human activity space in this plateau.However,the application has the defects of existing CLSE and ALSE models and methods in high-altitude areas.In this paper,we constructed CLSE and ALSE models applicable to alpine-gorge region in the Qinghai-Tibet Plateau,as well as proposed the measurement methods of four control parameters:air density,sloping land suitability for construction,air temperature and soil erosion resistance of sloping land.Based on the standard scenarios of elevation-slope classification with an interval of 100 m in elevation and 1°in slope,an empirical application research was carried out in Nyingchi city,the typical area of alpine-gorge region in the Qinghai-Tibet Plateau,and the feasibility was demonstrated of two different elevation-slope classification scenarios for CLSE and ALSE as well.This article obtains four conclusions:(1)Construction land suitability(CLS)and arable land suitability(ALS)in Nyingchi city can be divided into five grade types:suitable,relatively suitable,moderately suitable,less suitable,and unsuitable.The grade type of CLS and ALS is mainly unsuitable in the city,with 87.48%and 87.42%area ratio of unsuitable grade type,5.58%and 4.58%area ratio of less suitable grade type,and sum area ratio of suitable,relatively suitable,moderately suitable grade types accounted for only 6.94%and 7.60%.(2)The matching degree is high of CLS and ALS with current construction land and arable land under standard scenario in Nyingchi city,with the matching accuracy reaching 93.59%and 90.89%,respectively,among which the matching accuracy in Mainling county,Chagyib district,and Bowo county is above 95%,and the matching accuracy in Gongbo'gyada county,Nang county,and Medog county is very low,respectively.(3)The matching accuracy is 93.11%and 91.28%of CLS under

关 键 词：建设用地适宜性 耕地适宜性 土地资源 人类活动 高山峡谷区 

分 类 号：F323.211[经济管理—产业经济]