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[1]HUANG Qi,MOU Fengyun,ZHANG Yongchuan,et al.Evolution and Prediction of Cultivated Land Landscape Pattern in Multi-level Watershed of Chongqing Based on ANN-CA model[J].Research of Soil and Water Conservation,2023,30(01):379-387.[doi:10.13869/j.cnki.rswc.2023.01.035]

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Evolution and Prediction of Cultivated Land Landscape Pattern in Multi-level Watershed of Chongqing Based on ANN-CA model

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 01 Page number: 379-387 Column: Public date: 2023-01-10

Title:: Evolution and Prediction of Cultivated Land Landscape Pattern in Multi-level Watershed of Chongqing Based on ANN-CA model

Author(s):: HUANG Qi¹, MOU Fengyun¹, ZHANG Yongchuan¹, YANG Meng², CHEN Lin³, WANG Junxiu¹, TIAN Tian¹, HE Qingyun¹; (1.School of Smart City, Chongqing Jiaotong University, Chongqing 400074, China; 2.Chongqing Survey Institute, Chongqing 400020, China; 3.Chongqing Geographic Information and Remote Sensing Application Center, Chongqing 401147, China)

Keywords:: multilevel watershed scale; landscape pattern; artificial neural network; cellular automata; cultivated land

CLC:: S284

DOI:: 10.13869/j.cnki.rswc.2023.01.035

Abstract:: To solve the problem of scale effect of cultivated land evolution, this study made up for the existing shortcomings and innovatively starts from the multi-level watershed scale. The evolution of cultivated land landscape pattern in Chongqing from 2000 to 2030 was simulated and predicted based on Ann-ca model, which could not only provide a new perspective for the research scale of cultivated land in mountainous areas, but also help to interpret the current situation and trend of cultivated land utilization in Chongqing, and provide a reference for its cultivated land protection and planning. The results show that:(1)the accuracy of Ann-ca model is 89.33%, which is suitable for simulating the evolution of cultivated land in mountainous areas;(2)under the multiple impacts of urban expansion, conversion of farmland to forests, and farmland abandonment, from 2000 to 2020, the amount of cultivated land in Chongqing dropped from 40 640.87 km² to 38 590.33 km² at a first slow and then fast speed; most of the cultivated land was converted to urban construction land, followed by woodland, grassland;(3)in the first-class watershed, the scale of cultivated land decreased from 0.519 to 0.491, the fragmentation of cultivated land increased from 0.217 to 0.233, the irregularity of cultivated land increased from 0.311 to 0.336, and the aggregation of cultivated land decreased from 0.657 to 0.620;(4)in the secondary watershed, the average scale of cultivated land decreased from 0.492 to 0.470; the mean value of cultivated land fragmentation increased from 0.157 to 0.164; the mean value of cultivated land irregularity increased from 0.302 to 0.311; the mean value of cultivated land aggregation decreased from 0.646 to 0.630; the cultivated land landscape pattern in the secondary watershed was roughly consistent with that in the primary watershed, but presented more refined characteristics of spatial polarization; moreover, the historical law and future trend of temporal and spatial evolution of cultivated land landscape pattern in ‘one area' and ‘two groups' were significantly different. To sum up, the multi-level watershed scale analysis of cultivated land is helpful to solve the scale effect of cultivated land evolution and deduce its evolution law across scales.

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Last Update: 2023-01-10