本文選題：風(fēng)蝕　切入點(diǎn)：危險(xiǎn)性分析　出處：《干旱區(qū)地理》2016年05期 　論文類型：期刊論文

【摘要】：基于景觀尺度在錫林郭勒草地以400 m為間隔均勻布設(shè)160個(gè)采樣點(diǎn),對各采樣點(diǎn)的坡位、坡度、坡向、坡形、土壤含水量、土壤容重、砂粒含量、植被高度、植被蓋度、結(jié)皮蓋度、結(jié)皮厚度、苔蘚蓋度進(jìn)行野外實(shí)地調(diào)查及實(shí)驗(yàn)室分析測算。運(yùn)用層次分析法計(jì)算各因子對風(fēng)蝕的影響性權(quán)重,并結(jié)合實(shí)測值得出各采樣點(diǎn)的風(fēng)蝕危險(xiǎn)性及空間分布。結(jié)果顯示:研究區(qū)風(fēng)蝕危險(xiǎn)性具有明顯的空間差異,輕險(xiǎn)型(0風(fēng)險(xiǎn)值≤0.45)、危險(xiǎn)型(0.45風(fēng)險(xiǎn)值≤0.5)和強(qiáng)險(xiǎn)型0.5風(fēng)險(xiǎn)值≤1)區(qū)域的面積占研究區(qū)總面積的比例分別為68.7%、20.3%和11.0%。西部區(qū)域風(fēng)蝕危險(xiǎn)性較高,中部區(qū)域較低,東部區(qū)域危險(xiǎn)性介于西部與中部之間,但南北差異較大。影響風(fēng)蝕危險(xiǎn)性的主要因素是人類活動(dòng),為降低土壤風(fēng)蝕危險(xiǎn)性,應(yīng)減小人類活動(dòng)對環(huán)境的影響,對牧地建議降低放牧強(qiáng)度,對耕地建議采取保護(hù)性耕作措施。
[Abstract]:On the basis of landscape scale, 160 sampling sites were evenly distributed at 400 m intervals in Xilinguole grassland. The slope position, slope, slope direction, slope shape, soil water content, soil bulk density, sand content, vegetation height, vegetation coverage of each sampling site were studied. Field investigation, laboratory analysis and calculation of crust cover, crust thickness and moss cover were carried out. The influence weight of each factor on wind erosion was calculated by AHP. Combined with the measured values, the wind erosion risk and spatial distribution of each sampling point are obtained. The results show that the wind erosion risk in the study area is obviously different in space. The risk value of light risk type 0 鈮，

本文編號：1623358