Ecological environment changes of mining areas around Nansi lake with remote sensing monitoring.

Hu Liu,Anton Sroka,Mingyu Xia,Yan Jiang,Yue Jiang,Axel Preusse,Junhai Gao,Rafal Misa

doi:10.1007/s11356-021-13849-y

Abstract

Underground mining activity has existed for more than 100 years in Nansi lake. Coal mining not only plays a supporting role in local social and economic development but also has a significant impact on the ecological environment in the region. Landsat series remote sensing data (1988~2019) are used to research the impact of coal mining on the ecological environment in Nansi lake. Then support vector machine (SVM) classifier is applied to extract the water area of the upstream lake from 1988 to 2019, and ecological environment and spatiotemporal variation characteristics are analyzed by Remote Sensing Ecology Index (RSEI). The results illustrate that the water area change is associated with annual precipitation. In terms of ecological quality, the area of poor ecological quality areas increased by 101.782 km2, while the area of good and excellent quality areas decreased by 218.988 km2 from 2009 to 2019. So compared with 2009, the ecological quality of the lake is worse in 2019, and then the reason for this change is due to large-scale underground mining. Therefore, the coal mines from the natural reserve may be closed or limited to the mining boundary for protecting the lake's ecological environment.

Highlights

Underground mining activity has existed for more than 100 years in Nansi lake
Nansi lake is located in the southwest of Shandong Province, China (34°27′N to 35°20′N and 116°34′E to 117°24′E), which is composed of Nanyang lake, Dushan lake, Zhaoyang lake, and Weishan lake
More than 40 mines exist in Nansi lake after decades of exploration and development, Jining, Tengnan, and Tengbei coal fields are located in the research area

Summary

Introduction

Underground mining activity has existed for more than 100 years in Nansi lake. Coal mining plays a supporting role in local social and economic development and has a significant impact on the ecological environment in the region. Are used to research the impact of coal mining on the ecological environment in Nansi lake. Support Vector Machine (SVM) classifier is applied to extract the water area of the upstream lake from to 2019, and ecological environment and spatiotemporal variation characteristics are analyzed by Remote Sensing Ecology Index (RSEI). Compared with 2009, the ecological quality of the lake is worse in 2019, and the reason for this change is due to large-scale underground mining. The coal mines from the natural reserve may be closed or limited to the mining boundary for protecting the lake's ecological environment. Nansi lake was established as a provincial nature reserve by the government in. 2003, and the government adjusted the scope and functional areas of the Nansi lake provincial nature reserve in 2019 (Fig. 1). The current area is larger than the original after adjustment, the total area is 1116.51 km and the core zone is 451.15 km, which accounts for 40.41% of the total area

Methods

Results

Conclusion