| 农村宅基地整治潜力的空间显式测算与模拟 |
| |
| 引用本文： | 邹琳, 赵翔, 江平, 孔雪松. 农村宅基地整治潜力的空间显式测算与模拟[J]. 农业工程学报, 2020, 36(24): 247-256. DOI: 10.11975/j.issn.1002-6819.2020.24.029 |
| |
| 作者姓名： | 邹琳 赵翔 江平 孔雪松 |
| |
| 作者单位： | 1.广东省地质测绘院，广州510800;2.武汉大学资源与环境科学学院，武汉 430079 |
| |
| 基金项目： | 国家社科基金重大项目(18ZDA040) |
| |
| 摘 要： | 把握农民拆旧整治意愿是准确估计农村宅基地整治潜力的基本前提。现有的农村宅基地整治潜力测算模型在农民拆旧整治意愿建模和潜力空间显式测算表达方面依然存在一定局限性。该研究尝试利用机器学习算法和土地利用多源时空数据，研究面向区域农村宅基地整治潜力测算的农民拆旧整治意愿模拟模型，实现农村宅基地整治潜力的空间显式估算。研究首先利用高分遥感和土地利用数据，提取以废旧建筑物为主的拆旧潜力区；在此基础上，利用单分类支持向量机算法和区域拆旧整治历史样本对区域农民群体的拆旧整治意愿进行模拟，从而实现区域宅基地拆旧整治潜力的空间显式测算。研究选取广东信宜市平塘镇作为研究区对模型的性能进行了验证和评估。结果表明，模型的总体模拟精度达96.36%，其中正向样本模拟精度为96.88%，负向样本模拟精度为80.14%。根据模型预测结果，平塘镇实际可供整治的废旧宅基地面积约为36.02 hm2，占平塘镇废旧宅基地总面积的34.65%。研究结果将为中国正在实施的全域土地综合整治和国土空间规划决策提供重要的决策依据。
|
| 关 键 词： | 土地利用 整治 农村居民点 智能体建模 单分类 |
| 收稿时间： | 2020-09-21 |
| 修稿时间： | 2020-12-11 |
Spatially explicit calculation and simulation of estimating housing land consolidation potential in rural areas |
| |
| Zou Lin, Zhao Xiang, Jiang Ping, Wang Jing. Spatially explicit calculation and simulation of estimating housing land consolidation potential in rural areas[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2020, 36(24): 247-256. DOI: 10.11975/j.issn.1002-6819.2020.24.029 |
| |
| Authors: | Zou Lin Zhao Xiang Jiang Ping Wang Jing |
| |
| Affiliation: | 1.Land Use Planning Branch, Geology Surveying and Mapping Institute of Guangdong Province, Guangzhou 510800, China;2.School of Resources and Environmental Science, Wuhan University, Wuhan 430079, China |
| |
| Abstract: | Abstract: Land use/land cover change(LUCC) is one of the important driving forces of ecosystem services change. Because ecosystem services depend on different ecological and geographical on different spatial and temporal scales, it is of great significance to study ecosystem services based on LUCC. As the world''s largest and most influential water conservancy project, the Three Gorges Project has the largest number of immigrants and submerged land in the world. Since the implementation of the Three Gorges Project, the ecological environment of the reservoir area has undergone tremendous changes. Different scholars also hold different views on the advantages and disadvantages of the Three Gorges Project on the ecological environment. Therefore, we divided the study period into the pre-construction period (1980-2000) and post-construction period (2000-2018) of the Three Gorges Project, and analyzed the pros and cons of the Three Gorges Project from the perspective of ecosystem service value(ESV). Here, we first explored LUCC in the Three Gorges Reservoir area for two time periods. Then, applying a value transfer method with an equivalent value factor spatialized using the normalized difference vegetation index(NDVI), we estimated the changes of ESV in response to LUCC in a spatially explicit way. Finally, we constructed the gains and losses model of ESV and ecosystem services sensitivity model of nine kinds of secondary ecosystem services to deeply analyze the interference degree of land use activities to ESV. Major findings:(1) The LUCC during 2000-2018 was much more dramatic than 1980-2000. Before dam construction, the conversion of cultivated land to construction land was the main feature of land use change. After dam construction, it was manifested in the mutual conversion of forest land, grassland, cultivated land and the expansion of construction land. And the construction land in the main urban area of Chongqing continued to expand in 1980-2018. (2)ESV decreased first and then increased in the Three Gorges Reservoir area with a net increase of 1.849 billion yuan, and the ecosystem service function improved as a whole. The main reason for the improvement of regional ecosystem functions before and after dam construction was the conversion of cultivated land to forest land. Due to the continuous expansion of construction land, ESV in the main urban area of Chongqing continued to decrease. (3) The sensitivity indexes of ESV to land use change before and after dam construction were 0.73 and 1.46, respectively. The sensitivities of food production, hydrological regulation, waste treatment, soil conservation, and provision of aesthetic landscapes were increased. In spatial distribution, the nine kinds of sensitivities were all highly in the east of the reservoir area, Shizhu and Fengdu in the middle and the main urban areas of Chongqing, which indicated that ecosystem functions in these areas were easily affected by land use activities.The Three Gorges Project has greatly avoided the drought and flood disasters in the middle and lower reaches of the Yangtze River, and has also played an important role in protecting the ecosystem along the river. Therefore,. from the perspective of ESV, the advantages of The Three Gorges Project outweigh the disadvantages. |
| |
| Keywords: | land use ecosystem service value sensitivity assessment the Three Gorges Reservoir Area modified equivalent factor |
|
| 点击此处可从《农业工程学报》浏览原始摘要信息 |
|
点击此处可从《农业工程学报》下载全文 |
|
