干旱区生态环境知识资源中心(Arid): Mapping of Regional Soil Salinities in Xinjiang and Strategies for Amelioration and Management

Arid

	Mapping of Regional Soil Salinities in Xinjiang and Strategies for Amelioration and Management
	Wang Fei; Chen Xi; Luo Geping; Han Qifei
来源期刊	Chinese Geographical Science
ISSN	1002-0063
出版年	2015
卷号	25 期号:3 页码:321-336
英文摘要	Information on the spatial distribution of soil salinity can be used as guidance in avoiding the continued degradation of land and water resources by better informing policy makers. However, most regional soil-salinity maps are produced through a conventional direct-linking method derived from historic observations. Such maps lack spatial details and are limited in describing the evolution of soil salinization in particular instances. To overcome these limitations, we employed a method that included an integrative hierarchical- sampling strategy (IHSS) and the Soil Land Inference Model (SoLIM) to map soil salinity over a regional area. A fuzzy c-means (FCM) classifier is performed to generate three measures, comprising representative grade, representative area, and representative level (membership). IHSS employs these three measures to ascertain how many representative samples are appropriate. Through this synergetic assessment, representative samples are obtained and their soil-salinity values are measured. These samples are input to SoLIM, which is constructed based on fuzzy logic, to calculate the soil-forming environmental similarities between representative samples and other locations. Finally, a detailed soil-salinity map is produced through an averaging function that is linearly weighted, which is used to integrate the soil salinity value and soil similarity. This case study, in the Uyghur Autonomous Region of Xinjiang of China, demonstrates that the employed method can produce soil salinity map at a higher level of spatial detail and accuracy. Twenty-three representative points are determined. The results show that 1) the prediction is appropriate in Kuqa Oasis (R~2 = 0.70, RPD = 1.55, RMSE = 12.86) and Keriya Oasis (R~2 = 0.75, RPD = 1.66, RMSE = 10.92), that in Fubei Oasis (R~2 = 0.77, RPD = 2.01, RMSE = 6.32) perform little better than in those two oases, according to the evaluation criterion. 2) Based on all validation samples from three oases, accuracy estimation show the employed method (R~2 = 0.74, RPD = 1.67, RMSE = 11.18) performed better than the multiple linear regression model (R~2 = 0.60, RPD = 1.47, RMSE = 14.45). 3) The statistical result show that approximately half (48.07%) of the study area has changed to salt-affected soil, mainly distributed in downstream of oases, around lakes, on both sides of rivers and more serious in the southern than the northern Xinjiang. To deal with this issue, a couple of strategies involving soil-salinity monitoring, water management, and plant diversification are proposed, to reduce soil salinization. Finally, this study concludes that the employed method can serve as an alternative model for soil-salinity mapping on a large scale.
英文关键词	salinity soil mapping purposive sampling Soil Land Inference Model (SoLIM) fuzzy c-means (FCM) multiple linear regression (MLR) model
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5429890
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335498
作者单位	Wang Fei, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Chen Xi, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Luo Geping, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Han Qifei, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.
推荐引用方式 GB/T 7714	Wang Fei,Chen Xi,Luo Geping,et al. Mapping of Regional Soil Salinities in Xinjiang and Strategies for Amelioration and Management[J],2015,25(3):321-336.
APA	Wang Fei,Chen Xi,Luo Geping,&Han Qifei.(2015).Mapping of Regional Soil Salinities in Xinjiang and Strategies for Amelioration and Management.Chinese Geographical Science,25(3),321-336.
MLA	Wang Fei,et al."Mapping of Regional Soil Salinities in Xinjiang and Strategies for Amelioration and Management".Chinese Geographical Science 25.3(2015):321-336.