| Technology Application |
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Study of land salinization of Hanggin Rear Banner in Inner Mongolia based on ALOS image |
| ZHANG Lihua |
| Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China |
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Abstract 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 km2, 658.45 km2, 213.96 km2, 41.86 km2 and 28.38 km2 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.
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passive microwave remote sensing
microwave radiometer
snow depth(SD)
snow water equivalent(SWE)
inversion algorithm
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Issue Date: 08 December 2014
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[1] 俞仁培.对盐渍土资源开发利用的思考[J].土壤通报,2001,32:138-140. Yu R P.Ideas about exploitation and utilization of saline soil resources[J].Chinese Journal of Soil Science,2001,32:138-140.
[2] 姚远,丁建丽,阿尔达克·克里木,等.基于实测高光谱和电磁感应数据的区域土壤盐渍化遥感监测研究[J].光谱学与光谱分析,2013,33(7):1917-1921. Yao Y,Ding J L,Ardak K,et al.Research on remote sensing monitoring of soil salinization based on measured hyperspectral and EM38 data[J].Spectroscopy and Spectral Analysis,2013,33(7):1917-1921.
[3] 王宏,范英霞,高珊,等.基于3S技术的干旱区绿洲土壤盐渍化动态监测[J].地理空间信息,2013,11(1):131-134. Wang H,Fan Y X,Gao S,et al.Dynamic monitoring of soil salinization in the arid region oasis based on the 3S technology[J].Geospatial Information,2013,11(1):131-134.
[4] 亢庆,张增祥,赵晓丽,等.基于遥感技术的干旱区土地盐碱化分级[J].干旱区资源与环境,2006,20(3):144-148. Kang Q,Zhang Z X,Zhao X L,et al.Remote sensing application to rapid survey of land salinization based on multisource images[J].Journal of Arid Land Resources and Environment,2006,20(3):144-148.
[5] Yu R H,Liu T X,Xu Y P,et al.Analysis of salinization dynamics by remote sensing in Hetao irrigation district of north China[J].Agricultural Water Management,2010,97(12):1952-1960.
[6] 吴建生,张玉清,刘珍环,等.新疆焉耆县土地盐渍化遥感监测[J].干旱区地理,2010,33(2):251-257. Wu J S,Zhang Y Q,Liu Z H,et al.Land salinization monitoring with remote sensing on Yanqi County,Xinjiang[J].Arid Land Geography,2010,33(2):251-257.
[7] Rukhovich D I,Pankova E I,Chernousenko G I,et al.Long-term salinization dynamics in irrigated soils of the Golodnaya Steppe and methods of their assessment on the basis of remote sensing data[J].Eurasian Soil Science,2010,43(6):682-692.
[8] 王学全,高前兆,卢琦,等.内蒙古河套灌区水盐平衡与干排水脱盐分析[J].地理科学,2006,26(4):455-460. Wang X Q,Gao Q Z,Lu Q,et al.Salt-water balance and dry drainage desalting in Hetao irrigating area,Inner Mongolia[J].Scientia Geographica Sinica,2006,26(4):455-460.
[9] 管孝艳,王少丽,高占义,等.盐渍化灌区土壤盐分的时空变异特征及其与地下水埋深的关系[J].生态学报,2012,32(4):1202-1210. Guan X Y,Wang S L,Gao Z Y,et al.Spatio-temporal variability of soil salinity and its relationship with the depth to groundwater in salinization irrigation district[J].Acta Ecologica Sinica,2012,32(4):1202-1210.
[10] 安永清,屈永华,高鸿永,等.内蒙古河套灌区土壤盐碱化遥感监测方法研究[J].遥感技术与应用,2008,23(3):316-322. An Y Q,Qu Y H,Gao H Y,et al.Supervising the salted land distribution of Hetao irrigation area in Inner Mongolia by using remote sensing[J].Remote Sensing Technology and Application,2008,23(3):316-322.
[11] Lu S L,Zou L J,Shen X H,et al.Multi-spectral remote sensing image enhancement method based on PCA and IHS transformations[J].Journal of Zhejiang University Science,2011,12(6):453-460.
[12] 王广亮,李英成,曾钰,等.ALOS数据像素级融合方法比较[J].测绘科学,2008,33(6):121-124. Wang G L,Li Y C,Zeng Y,et al.Comparison and analysis of pixel-level image fusion algorithms applicable to ALOS data[J].Science of Surveying and Mapping,2008,33(6):121-124.
[13] 中华人民共和国水利部.GB/T50123-1999土工试验方法标准[S].北京:中国计划出版社,1999:31-41. Ministry of Water Resources of the People's Republic of China. GB/T50123-1999 Standard for Soil Test Method[S].Beijing:China Planning Publishing House,1999:31-41. |
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2015,
Vol. 27
