Optimization of Land Reuse Structure in Coal Mining Subsided Areas Considering Regional Economic Development: A Case Study in Pei County, China

被引:10
|
作者
Li, Zhen [1 ]
Wu, Songlin [2 ]
Zhang, Shiwen [3 ]
Nie, Chaojia [3 ]
Li, Yong [1 ]
Huang, Yuanfang [1 ]
机构
[1] China Agr Univ, Key Lab Agr Land Qual, Key Lab Arable Land Conservat North China, Coll Land Sci & Technol,Minist Nat Resources, Beijing 100193, Peoples R China
[2] Univ Queensland, Sustainable Minerals Inst, Ctr Mined Land Rehabil, Brisbane, Qld 4067, Australia
[3] Anhui Univ Sci & Technol, Coll Earth & Environm Sci, Huainan 232001, Peoples R China
基金
中国国家自然科学基金;
关键词
land reclamation; high groundwater coal basins; regional development; post-mining land use optimization; CLUE-S model; HIGH GROUNDWATER TABLE; REMOTE-SENSING DATA; CLUE-S MODEL; SPATIAL-DISTRIBUTION; DECISION-MAKING; CARBON STORAGE; RECLAMATION; RESTORATION; SIMULATION; SCENARIOS;
D O I
10.3390/su12083335
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Land subsidence, which has caused large-scale settlement loss and farmland degradation, was regarded as the main constraint for land reclamation in the High Groundwater Coal Basins (HGCBs) in the eastern China plain. Both coal mining and agricultural production are important for regional development in this area. In general, the land reclamation direction in this area is greatly affected by the adequacy of filling materials and the land use demand of regional economic development. Taking seven coal mining subsided areas in Pei county, located in the eastern China plain, for example, this study proposed an integrated model (including the Limit Condition model, Logistic Regression model, Grey Linear Programming model and the conversion of land use and its effects at small regional extent (CLUE-S) model) to simulate and optimize the post-mining land use structure to meet the economic development needs of Pei county. Then, the post-mining land use structure under different scenarios, which were set based on the subsidence depth, were compared to explore the optimal collapse depth for separating the damaged land into the filling area and non-filling area. The landscape structure, ecological benefits, engineering quantity and reclaimed farmland area were used to compare the reclaimed land use structure of different scenarios. The results showed that the integrated model could efficiently simulate the reclaimed land use structure to meet the land demand for regional development. The optimal collapse depth for separating the damaged area into the filling area and non-filling area was 2.6 m. Currently, the reclaimed land use structure not only needs a low quantity of filling material, but also obtains a good landscape structure and elevated ecosystem services value. Furthermore, the reclaimed urban land was mainly distributed around Pei town, and the reclaimed farmland was mostly distributed in the area between Pei town and Weishan lake, which were consistent with the pattern of urbanization. The study provides valuable information for future land use plans for Pei county and will contribute to the methods of post-mining land reclamation in other HGCBs.
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页数:16
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