Journal of Geographical Sciences >
Comprehensive evaluation of newly cultivated land sustainable utilization at project scale: A case study in Guangdong, China
Guo Chang, specialized in sustainable land use. E-mail: guochang@smail.nju.edu.cn |
Received date: 2023-07-19
Accepted date: 2024-01-04
Online published: 2024-04-24
Supported by
National Natural Science Foundation of China(42271259)
Cultivated land plays a pivotal role in ensuring national food security, particularly in populous nations like China, where substantial investments are made to develop cultivated land as a counterbalance to construction-occupied areas. Consequently, long-term, effective monitoring of the utilization of newly cultivated land becomes imperative. This study introduces a comprehensive monitoring framework, designed for refined scales, that leverages remote sensing data. The framework focuses on the sustainable utilization of newly cultivated land, emphasizing utilization sustainability, productivity stability, and landscape integration. Its effectiveness was validated through a case study in Guangdong province, China. The results revealed satisfactory utilization sustainability and improved productivity stability of newly cultivated land in Guangdong, though landscape integration showed sub-optimal results. Furthermore, the comprehensive evaluation categorized the newly cultivated land into three levels and eight types. The study recommends enhancing the site selection process for newly cultivated land and improving the long-term monitoring, as well as incentive and constraint mechanisms, for their utilization. This study can provide a scientific reference to bolster the implementation of cultivated land protection policies, thereby contributing significantly to high-quality economic and social development.
GUO Chang , JIN Xiaobin , YANG Xuhong , XU Weiyi , SUN Rui , ZHOU Yinkang . Comprehensive evaluation of newly cultivated land sustainable utilization at project scale: A case study in Guangdong, China[J]. Journal of Geographical Sciences, 2024 , 34(4) : 745 -762 . DOI: 10.1007/s11442-024-2225-z
Figure 1 Research framework of newly cultivated land utilization evaluation |
Table 1 Land use type and corresponding grading index |
Land use type | Grading index | Land use type | Grading index |
---|---|---|---|
Cultivated land | 1 | Water | 3 |
Forest or shrub | 2 | Impervious land | 4 |
Table 2 Grades of the productivity stability index |
Characteristics of index | Grade |
---|---|
High productivity status index and low productivity fluctuation index | High |
High productivity status index and high productivity fluctuation index | Medium |
Low productivity status index and high or low productivity fluctuation index | Low |
Table 3 Grades of landscape integration index |
Characteristics of index | Grade |
---|---|
High or low environmental coordination index and high cultivated land contiguity index | High |
Low environmental coordination index and low cultivated land contiguity index | Medium |
High environmental coordination index and low cultivated land contiguity index | Low |
Figure 2 The conceptual model of utilization types of newly cultivated land. The red, green, and blue solid lines represent x (Utilization sustainability), y (Productivity stability), and z (Landscape integration), respectively. |
Figure 3 The combinations and classification criteria of the three dimensions of newly cultivated land utilization evaluation. This study defined utilization sustainability as x, productivity stability as y, and landscape integration as z. L is the abbreviation of low, M is medium, and H is high. Each thick black box represents a combination type. |
Figure 4 Administrative divisions of Guangdong province and location of the case areas |
Figure 5 Results of utilization sustainability index |
Figure 6 Results of productivity stability index |
Figure 7 Results of landscape integration index |
Figure 8 Spatial characteristics of utilization sustainability index (a), productivity stability index (b) and landscape integration index (c) in Guangdong province |
Figure 9 Comprehensive evaluation and classification of newly cultivated land in Guangdong province |
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