Spatial distribution of mine areas in the Luanhe River Basin, China: Clustering implications

Jingjing Li , Liang Tang , Jinsong Yang , Lingfei Qu , Fan Meng , Feng Jiang , Lei Xu , Sijie He
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Abstract

The Luanhe River Basin is the most mined region in China, and spatial analysis of mine areas is beneficial for identifying hotspots of mining-related threats and assessing their impacts in this catchment. From an Earth system science perspective, we examined the spatial clustering of mine areas and the interactions between geographical attributes in the Luanhe River Basin. The findings are: (1) the total mine areas in the Luanhe River Basin are approximately 368.5 km2 (2749 polygons), primarily located in the middle and lower reaches. (2) The Global Moran's I for scale and mining land of mine areas in the Luanhe River Basin is 0.04 and 0.45, respectively. This indicates that the scale of mine areas is randomly spread in the basin, while the mining exhibits clustering property. Consequently, clustered mine areas cover approximately 207 km2 (56.1 %), while randomly distributed mine areas cover ∼161.5 km2 of land (43.9 %). (3) A merged region is formed when the buffer distance of mine areas exceeds 2 km, potentially creating contiguous mining threat areas. This research provides a dataset for managing and governance mine areas in the Luanhe River Basin.

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中国滦河流域矿区的空间分布:集群影响
滦河流域是中国采矿最多的地区,对矿区的空间分析有利于确定与采矿相关的威胁热点并评估其对该流域的影响。从地球系统科学的角度,我们研究了滦河流域矿区的空间集聚以及地理属性之间的相互作用。研究结果如下(1) 滦河流域矿区总面积约为 368.5 平方公里(2749 个多边形),主要分布在中下游。(2)滦河流域矿区规模和采矿用地的全球莫兰 I 分别为 0.04 和 0.45。这表明矿区规模在流域内呈随机分布,而采矿则表现出集群性。因此,聚集矿区的面积约为 207 平方公里(56.1%),而随机分布矿区的面积约为 161.5 平方公里(43.9%)。(3) 当矿区的缓冲距离超过 2 公里时,就会形成一个合并区域,有可能形成连片的采矿威胁区。这项研究为滦河流域矿区的管理和治理提供了一个数据集。
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