Open Access

ARTICLE

Evolution of Desertification Types on the North Shore of Qinghai Lake

Wenzheng Yu¹, Jintao Cui², Yang Gao¹, Mingxuan Zhu¹, Li Shao³, Yanbo Shen^4,5,*, Xiaozhao Zhang⁶, Chen Guo⁷, Hanxiaoya Zhang⁸

1 School of Geographical Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044, China
2 College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China
3 School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
4 Public Meteorological Service Center, China Meteorological Administration, Beijing, 100081, China
5 Center for Wind and Solar Energy Resources, China Meteorological Administration, Beijing, 100081, China
6 China Huaneng Group Co., Ltd., Beijing, 100036, China
7 China Huaneng Group Cleaning Energy Technology Academy Co., Ltd., 100081, China
8 Faculty of Science, The University of Auckland, 1010, New Zealand

* Corresponding Author: Yanbo Shen. Email:

Computers, Materials & Continua 2022, 71(2), 3635-3646. https://doi.org/10.32604/cmc.2022.023195

Received 30 August 2021; Accepted 25 October 2021; Issue published 07 December 2021

Abstract

Land desertification is a widely concerned ecological environment problem. Studying the evolution trend of desertification types is of great significance to prevent and control land desertification. In this study, we applied the decision tree classification method, to study the land area and temporal and spatial change law of different types of desertification in the North Bank of Qinghai Lake area from 1987 to 2014, based on the current land use situation and TM remote sensing image data of Haiyan County, Qinghai Province, The results show that the area of mild desertification land and moderate desertification land in the study area has decreased, while the area of severe desertification land and extreme desertification land has increased significantly in the past 30 years. The area of desertification land decreased by 4.02 km², of which the area of mild and moderate desertification land decreased by 39.73 km² and 36.8 km² respectively, and the area of severe and extreme desertification land increased by 32.78 km² and 39.73 km² respectively. As for the mutual transformation relationship, the transformation from severe desertification land to extreme desertification land is the main, and the junction of severe desertification land and extreme desertification land is the sensitive area of transformation. In the north shore of Qinghai Lake, the sandy land tends to expand eastward. The research provides reference basis for local land desertification monitoring, and has a great guidance for local effective land desertification and soil and water conservation.

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