干旱区生态环境知识资源中心(Arid): 基于ALOS影像的内蒙古杭锦后旗土地盐渍化程度分级

Arid

	基于ALOS影像的内蒙古杭锦后旗土地盐渍化程度分级
其他题名	Study of land salinization of Hanggin Rear Banner in Inner Mongolia based on ALOS image
	张利华
来源期刊	国土资源遥感
ISSN	1001-070X
出版年	2015
卷号	27 期号:1 页码:121-126
中文摘要	土地盐渍化是影响区域生态环境质量和农业生产安全的重要因素,掌握其区域分布规律对盐渍化的预防和治理具有重要意义。基于ALOS影像和实地调查、土壤样品分析数据建立内蒙古杭锦后旗农用地盐渍化等级划分标准和遥感解译标志,分析了不同地物在不同波段的光谱特征,获得杭锦后旗土地盐渍化等级分类图。结果表明,杭锦后旗农用地盐渍化严重,中度以上盐渍化农用地占土地总面积的15.76%,占农用地总面积的25.68%; 重度以上盐渍化农用地占土地总面积的3.28%,占农用地总面积的5.33%。研究区微度和轻度盐渍化农用地分布最广,中度盐渍化农用地分布比较分散,重度盐渍化农用地和盐土则主要沿灌渠和海子边缘分布,由西北向东南重度以上盐渍化土地比例有增加的趋势。
英文摘要	Land salinization can lead to the degradation and disappearance of soil resources, so it is an important factor affecting the eco-environmental quality and agricultural production security, especially in arid and semi-arid environments. Land salinization is a main environmental problem in Hetao irrigation area of Inner Mongolia including Hanggin Rear Banner, because of arid climate, high salinity soil material, highly mineralized groundwater, and high groundwater level caused by improper irrigation and drainage. In this study, the intensity of land salinization was divided into five grades according to lab data of surface soil samples. Interpreting marks and spectral characteristics of different landscapes in Hanggin Rear Banner were built and analyzed by using ERDAS, fused ALOS image, field investigation and lab data of surface soil samples. The map for classification of land salinization in Hanggin Rear Banner was compiled based on interpreting marks, spectral characteristics and supervised classification method. The results indicate that the area of slightly salinized land (total content of water-soluble salt is 0~0.3%), weakly salinized land (total content of water-soluble salt is 0.3%~0.5%), moderately salinized land (total content of water-soluble salt is 0.5%~1.0%), strongly salinized land (total content of water-soluble salt is 1.0%~1.6%) and saline soil (total content of water-soluble salt is more than 1.6%) are 181.38 km~2, 658.45 km~2, 213.96 km~2, 41.86 km~2 and 28.38 km~2 respectively. The land whose content of water-soluble salt is lower than 0.5% has little influence on agricultural production. The salinized land possesses as high as 55.02% of the total area in Hanggin Rear Banner. The salinized agricultural land with water-soluble salt content more than 0.5% accounts for 15.76% of the total area and 25.68% of the total agricultural land respectively, and the salinized places are distributed dispersedly among agricultural lands. The salinized agricultural land with water-soluble salt content more than 1.0% accounts for 3.28% of the total area and 5.33% of the total agricultural land respectively, and the salinized places are mainly distributed around irrigation channels and lakes, with their proportion tending to increase from northwest to southeast. The results have an important significance for land salinization control and eco-environment improvement in the Hetao irrigation area of Inner Mongolia.
中文关键词	ALOS影像 ; 杭锦后旗 ; 光谱特征 ; 土地盐渍化程度分级
英文关键词	ALOS image Hanggin Rear Banner spectral characteristics classification standard of land salinization
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5359614
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232868
作者单位	(武汉)中国地质大学地球科学学院地理系, 武汉, 湖北 430074, 中国
推荐引用方式 GB/T 7714	张利华. 基于ALOS影像的内蒙古杭锦后旗土地盐渍化程度分级[J],2015,27(1):121-126.
APA	张利华.(2015).基于ALOS影像的内蒙古杭锦后旗土地盐渍化程度分级.国土资源遥感,27(1),121-126.
MLA	张利华."基于ALOS影像的内蒙古杭锦后旗土地盐渍化程度分级".国土资源遥感 27.1(2015):121-126.

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