CAJ | 학술논문

利用2006年Landsat TM影像、土壤数据、DEM数据及气象资料,基于RS和GIS技术,针对土地沙漠化、土壤盐渍化和水土流失等主要生态问题,选取植被类型、干旱指数、地形、降水侵蚀力值等8个指标,建立了景观生态综合评价模型,评价了黑河流域景观生态质量.结果表明:(1)黑河流域景观生态综合指数平均值为5.870,以3级和4级为主体,占总面积的68.65%,景观生态质量一般;(2)景观生态质量水平分布表现出明显的区域差异,呈现出流域上游最好、中游次之、下游最差的特点,从行政范围来看,民乐县、山丹县、甘州区、祁连县和肃州区较好,额济纳旗、金塔县、嘉峪关市等则较差.
이용2006년Landsat TM영상、토양수거、DEM수거급기상자료,기우RS화GIS기술,침대토지사막화、토양염지화화수토류실등주요생태문제,선취식피류형、간한지수、지형、강수침식력치등8개지표,건립료경관생태종합평개모형,평개료흑하류역경관생태질량.결과표명:(1)흑하류역경관생태종합지수평균치위5.870,이3급화4급위주체,점총면적적68.65%,경관생태질량일반;(2)경관생태질량수평분포표현출명현적구역차이,정현출류역상유최호、중유차지、하유최차적특점,종행정범위래간,민악현、산단현、감주구、기련현화숙주구교호,액제납기、금탑현、가욕관시등칙교차.
Based on RS and GIS techniques, a integrated evaluation model of eco-environment quality was developed according to Landsat TM images, soil data, DEM and meteorologic material. Eight indices were selected in the model, which were composed of vegetation type, drought index, soil texture, rainfall erosivity, etc. On the basis, the eco-environment quality of Heihe River basin is evaluated. The results show that (1)Integrated evaluation index of-eco-environment quality in Heihe River basin is 5. 870. The eco-environment quality at third and fourth grade occupies 68.65% of the total area. The eco-environment quality of Heihe River basin is not quite good;(2)The horizontal distribution of the eco-environment quality presents evident regional differences. The eco-environment quality is the best at the upper reaches of the river, that takes the second place in the middle reaches of the river and is the worst in the lower reaches of a river. As far as the administration is concerned, the eco-environment of Minle county, Shandan county, Ganzhou district, Qilian county and Suzhou district is good. While the eco-environment in Ejina county, Jinta county and Jiayuguan city is relatively bad.