基于RS和GIS的瑪曲高原土地沙漠化時(shí)空演變研究
發(fā)布時(shí)間：2018-07-31 20:24
【摘要】：基于RS和GIS空間分析技術(shù),以瑪曲高原多期Landsat遙感數(shù)據(jù)為主要信息源,監(jiān)測(cè)分析了1977—2014年瑪曲高原沙漠化土地的時(shí)空演變規(guī)律。結(jié)果表明:近40年來(lái)瑪曲高原的土地沙漠化經(jīng)歷了迅速發(fā)展—緩慢發(fā)展—急速逆轉(zhuǎn)—緩慢逆轉(zhuǎn)—快速逆轉(zhuǎn)的變化過(guò)程。1977—1995年瑪曲高原沙漠化處于快速擴(kuò)張階段,年均擴(kuò)張速率為3.01%;1995—2014年沙漠化擴(kuò)張趨勢(shì)出現(xiàn)逆轉(zhuǎn),年均逆轉(zhuǎn)速率為4.14%。沙漠化土地的發(fā)展和逆轉(zhuǎn)區(qū)域主要分布在東北部歐拉秀瑪鄉(xiāng)和尼瑪鄉(xiāng)黃河沿岸、東南部采日瑪鄉(xiāng)和曼日瑪鄉(xiāng)沼澤區(qū)、西南部齊哈瑪鄉(xiāng)和中部阿萬(wàn)倉(cāng)鄉(xiāng)黃河支流兩岸。瑪曲高原沙漠化土地的發(fā)展和逆轉(zhuǎn)過(guò)程并非逐級(jí)遞增或遞減,而是在15—20年內(nèi)交替出現(xiàn),不同等級(jí)沙漠化土地之間的轉(zhuǎn)移也存在明顯的躍變。從整體來(lái)看,瑪曲高原土地沙漠化呈現(xiàn)逆轉(zhuǎn)趨勢(shì),區(qū)域生態(tài)環(huán)境得到明顯改善。
[Abstract]:Based on the RS and GIS spatial analysis techniques, the spatio-temporal evolution of the desertification land in the Maqu plateau from 1977 to 2014 is monitored and analyzed with the multi period Landsat remote sensing data of the Maqu plateau. The results show that the desertification of the Maqu plateau in the last 40 years has experienced a rapid development, a slow development, a rapid reversal, a slow reversal and a rapid reversal. The change process of the reverse is.1977 - 1995, the desertification of Maqu plateau is in the rapid expansion stage, the annual average expansion rate is 3.01%, the trend of desertification expansion in 1995 - 2014 is reversed, and the annual reverse rate is 4.14%. desertification land development and reverse region mainly distributed in the northeast of the eulasiu and Ni Ma Township and the southeast. The development and reversal process of the desertification land in the Maqu plateau is not gradually increasing or decreasing, but in 15 to 20 years, and the transition between different grades of desertification land is obviously leaped. From the overall point of view, Maqu, Maqu Desertification in plateau area shows a reverse trend, and the regional ecological environment has been significantly improved.
【作者單位】： 西北師范大學(xué)地理與環(huán)境科學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41161036,41171018) 甘肅省自然科學(xué)基金項(xiàng)目(1010RJZA016) 西北師范大學(xué)青年教師科研能力提升計(jì)劃(NWNU-LKON-10-34)
【分類(lèi)號(hào)】：X171.1;X87;P208
[Abstract]:Based on the RS and GIS spatial analysis techniques, the spatio-temporal evolution of the desertification land in the Maqu plateau from 1977 to 2014 is monitored and analyzed with the multi period Landsat remote sensing data of the Maqu plateau. The results show that the desertification of the Maqu plateau in the last 40 years has experienced a rapid development, a slow development, a rapid reversal, a slow reversal and a rapid reversal. The change process of the reverse is.1977 - 1995, the desertification of Maqu plateau is in the rapid expansion stage, the annual average expansion rate is 3.01%, the trend of desertification expansion in 1995 - 2014 is reversed, and the annual reverse rate is 4.14%. desertification land development and reverse region mainly distributed in the northeast of the eulasiu and Ni Ma Township and the southeast. The development and reversal process of the desertification land in the Maqu plateau is not gradually increasing or decreasing, but in 15 to 20 years, and the transition between different grades of desertification land is obviously leaped. From the overall point of view, Maqu, Maqu Desertification in plateau area shows a reverse trend, and the regional ecological environment has been significantly improved.
【作者單位】： 西北師范大學(xué)地理與環(huán)境科學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41161036,41171018) 甘肅省自然科學(xué)基金項(xiàng)目(1010RJZA016) 西北師范大學(xué)青年教師科研能力提升計(jì)劃(NWNU-LKON-10-34)
【分類(lèi)號(hào)】：X171.1;X87;P208
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 柴成武;徐先英;張莉;唐進(jìn)年;劉虎俊;吳春榮;梁泰;;瑪曲縣氣候特征分析[J];草原與草坪;2012年02期
2 褚琳;黃，
本文編號(hào)：2156735
本文鏈接：http://sikaile.net/kejilunwen/dizhicehuilunwen/2156735.html
最近更新
教材專(zhuān)著
