黄河流域生态保护和高质量发展已成为国家战略,对黄河入海口滩区水体范围进行动态监测研究,避免水体演变所衍生出的潜在淹没风险具有重要意义。通过获取长时序丰水期Landsat系列遥感卫星影像数据集,采用基于决策树的多指数陆表水体提取...黄河流域生态保护和高质量发展已成为国家战略,对黄河入海口滩区水体范围进行动态监测研究,避免水体演变所衍生出的潜在淹没风险具有重要意义。通过获取长时序丰水期Landsat系列遥感卫星影像数据集,采用基于决策树的多指数陆表水体提取方法,获取黄河入海口滩区1976—2020年10个研究时点的最大水体范围,并通过叠加分析计算各个区域历史淹没频次,进而识别城镇村庄居民点和采矿用地淹没风险。研究结果表明,10个研究时点中被淹没5次以上的区域为463.7 km 2,以2015年共631个城镇村庄居民点和采矿用地为例,低淹没风险413个,中淹没风险52个,高淹没风险20个。黄河入海口滩区城镇村庄居民点等建设用地应明确迁建需求,科学迁建选址,完善基础设施。展开更多
We review the latest aeromagnetic geological data of continental China. We discuss the latest achievements in geological mapping and the newly detected features based on aeromagnetic data. Using aeromagnetic data coll...We review the latest aeromagnetic geological data of continental China. We discuss the latest achievements in geological mapping and the newly detected features based on aeromagnetic data. Using aeromagnetic data collected for more than 50 years, a series of 1:5000000 and 1:1000000 aeromagnetic maps of continental China were compiled using state-of-the-art digital technology, and data processing and transformation. Guided by plate tectonics and continental dynamics, rock physical properties, and magnetic anomalies, we compiled maps of the depth of the magnetic basement of continental China and the major geotectonic units, and presented newly detected geological structures based on the aeromagnefic data.展开更多
文摘黄河流域生态保护和高质量发展已成为国家战略,对黄河入海口滩区水体范围进行动态监测研究,避免水体演变所衍生出的潜在淹没风险具有重要意义。通过获取长时序丰水期Landsat系列遥感卫星影像数据集,采用基于决策树的多指数陆表水体提取方法,获取黄河入海口滩区1976—2020年10个研究时点的最大水体范围,并通过叠加分析计算各个区域历史淹没频次,进而识别城镇村庄居民点和采矿用地淹没风险。研究结果表明,10个研究时点中被淹没5次以上的区域为463.7 km 2,以2015年共631个城镇村庄居民点和采矿用地为例,低淹没风险413个,中淹没风险52个,高淹没风险20个。黄河入海口滩区城镇村庄居民点等建设用地应明确迁建需求,科学迁建选址,完善基础设施。
基金supported by the China Land Aeromagnetic Characteristics and Tectonic Structures Research(No.1212011087009)part of the national geological and mineral resources investigation projects,and the Comprehensive Exploration of Aero Geophysical&Remote Sensing Survey and Interpretation System Research(No.2013AA063905)part of the planning for national high technology research and development
文摘We review the latest aeromagnetic geological data of continental China. We discuss the latest achievements in geological mapping and the newly detected features based on aeromagnetic data. Using aeromagnetic data collected for more than 50 years, a series of 1:5000000 and 1:1000000 aeromagnetic maps of continental China were compiled using state-of-the-art digital technology, and data processing and transformation. Guided by plate tectonics and continental dynamics, rock physical properties, and magnetic anomalies, we compiled maps of the depth of the magnetic basement of continental China and the major geotectonic units, and presented newly detected geological structures based on the aeromagnefic data.