內(nèi)蒙古河套灌區(qū)近30年鹽堿化時(shí)空演變及驅(qū)動(dòng)因素分析
本文選題:鹽堿化 切入點(diǎn):時(shí)空演變 出處:《中國(guó)農(nóng)村水利水電》2016年09期 論文類(lèi)型:期刊論文
【摘要】:土壤鹽堿化是制約灌區(qū)可持續(xù)發(fā)展的重要因素之一。基于遙感和GIS技術(shù),利用Landsat TM/ETM數(shù)據(jù),分析了內(nèi)蒙古河套灌區(qū)1987-2014年土地鹽堿化時(shí)空演變,并結(jié)合區(qū)域氣象、水文、灌排等資料,對(duì)鹽堿化驅(qū)動(dòng)因素進(jìn)行分析。結(jié)果表明,近30年來(lái)河套灌區(qū)鹽堿地經(jīng)歷了萎縮(1987-1993)-緩慢擴(kuò)張(1993-2006)-萎縮(2006-2014)3個(gè)階段,但總體呈現(xiàn)縮減趨勢(shì)。從空間分布來(lái)看,1987-2006年,在灌區(qū)西南部-中部大部-東北部形成鹽堿地分布集中帶,且集中帶經(jīng)歷了從萎縮到逐步擴(kuò)張的過(guò)程;2006年以后,大片鹽堿地呈現(xiàn)碎片化趨勢(shì)。多元逐步回歸分析表明,灌區(qū)鹽堿化主要驅(qū)動(dòng)因素為排灌比、平均地下水埋深和蒸發(fā)量。
[Abstract]:Soil salinization is one of the important factors that restrict the sustainable development of irrigated area. Based on remote sensing and GIS technology, using Landsat TM/ETM data, the spatiotemporal evolution of soil salinization in Hetao Irrigation area of Inner Mongolia from 1987 to 2014 is analyzed, and combined with regional meteorology and hydrology. Based on the data of irrigation and drainage, this paper analyzes the driving factors of salinization in Hetao Irrigation area. The results show that the saline-alkali land in Hetao Irrigation area has experienced three stages of shrinking from 1987 to 1993 and slowly expanding from 1993 to 2006 (2006-2014), but the overall trend is decreasing. From the spatial distribution point of view, the saline-alkali land in Hetao Irrigation area from 1987 to 2006. The distribution and concentration zone of saline-alkali land formed in the southwest, central and northeast of the irrigated area, and experienced a process from shrinking to gradually expanding. After 2006, a large area of saline-alkali land showed a trend of fragmentation. The multiple stepwise regression analysis showed that, The main driving factors of salinization in irrigation area are drainage and irrigation ratio, average groundwater depth and evaporation.
【作者單位】: 中國(guó)水利水電科學(xué)研究院;
【基金】:水利部公益性行業(yè)科研專(zhuān)項(xiàng)(201401019,201401001)
【分類(lèi)號(hào)】:S156.4
【相似文獻(xiàn)】
相關(guān)期刊論文 前8條
1 李書(shū)敏;;內(nèi)蒙古黃河河套灌區(qū)凍土水鹽運(yùn)動(dòng)規(guī)律[J];內(nèi)蒙古水利科技;1986年Z1期
2 曹明;屈忠義;王耀強(qiáng);;基于ArcGIS的河套灌區(qū)水土資源數(shù)據(jù)庫(kù)的開(kāi)發(fā)[J];人民長(zhǎng)江;2009年11期
3 侯玉明;王剛;王二英;梁凱發(fā);;河套灌區(qū)鹽堿土成因、類(lèi)型及有效的治理改良措施[J];現(xiàn)代農(nóng)業(yè);2011年01期
4 王亞?wèn)|,樊忠成,李新民,王蘭明;河套灌區(qū)節(jié)水改造工程實(shí)施前后鹽分勻衡分析[J];內(nèi)蒙古水利;2001年02期
5 史吉?jiǎng)?王耀強(qiáng);;ArcGIS在河套灌區(qū)數(shù)字要素圖實(shí)現(xiàn)上的應(yīng)用[J];實(shí)驗(yàn)室科學(xué);2008年01期
6 溫苑;李樹(shù)鋒;龐勇;;河套灌區(qū)農(nóng)田范圍內(nèi)的水分、鹽分動(dòng)態(tài)[J];內(nèi)蒙古水利;2008年01期
7 段軍,趙玉川;關(guān)于巴盟河套灌區(qū)節(jié)約用水及土壤鹽漬化改良的探討[J];內(nèi)蒙古水利;2000年01期
8 ;[J];;年期
相關(guān)碩士學(xué)位論文 前1條
1 婁婷;河套灌區(qū)土壤鹽分分布及其影響因素初步分析[D];揚(yáng)州大學(xué);2015年
,本文編號(hào):1566947
本文鏈接:http://sikaile.net/kejilunwen/nykj/1566947.html