Application of Multi-source Remote Sensing Technology in Environmental Prediction for Dachang Gold Mine Concentration Area, Qinghai
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摘要:
为研究矿业活动对青海大场金矿矿集区生态环境变化的影响,选择1988、1996、2004及2016年4个时期的Landsat5 TM、SPOT5、高分一号等多源遥感数据,采用归一化植被指数法开展植被覆盖度解译,并与矿业活动解译结果对比研究,探讨历史时期矿业活动对生态环境影响的时空机制。研究结果表明:矿集区生态环境变化与矿业活动之间没有明显的相关性。气象条件是控制矿集区生态环境的主要因素,对生态环境的改变是直接的、强烈的;矿业活动是影响生态环境变化的次要叠加因素,对生态环境的改变是局部的、有限的。未来在合理、有序、规模化、集约化开发利用的前提下,在矿集区开展矿业开发活动是可行的,进而建成有序、高效开发的矿业产业基地,将对拉动地方经济发展具有积极意义。
Abstract:In order to study the impact of mining activities on the eco-environmental change of Dachang gold mine concentration area in Qinghai Province, we use Landsat 5 TM, SPOT5 and Gaofen 1 remote sensing data in 1988, 1996, 2004 and 2016 to interpret vegetation coverage using normalized difference vegetation index method, to be compared with the interpretation results of mining activities, and to explore the impact of mining activities on eco-environment in the historical period. The analysis shows that there is no obvious correlation between the eco-environment and mining activities in the mineral concentration area. Meteorological conditions are the main factors controlling the eco-environment of the mineral concentration area, and which are directive and intensive to the changes of eco-environment. Mining activity is the secondary superposition factor, and its change to eco-environment is partial and limited. In the future, it is feasible to carry out mining development activities in the mining area, and then build an ordered and efficient mining industry base on the premise of rational, orderly, large-scale and intensive development and utilization, which will have positive significance for driving local economic development.
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Key words:
- remote sensing technology /
- multi-temporal /
- vegetation coverage /
- eco-environment /
- prediction
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表 1 植被覆盖度分级统计结果
Table 1. The statistical result of vegetation coverage classification
Grade Grade standards Distribution area/km2 Vegetation
coverage /%1988 1996 2004 2016 5级 80~100 36.13 22.30 37.06 58.48 4级 60~80 64.37 35.90 44.56 92.47 3级 40~60 206.04 175.41 148.63 346.25 2级 20~40 579.29 678.47 583.98 448.64 1级 0~20 137.44 111.72 209.24 78.14 表 2 主要矿床(点)探矿工程活动统计
Table 2. The statistical table of prospecting engineering activities of main deposits
Year Trial trench Alluvial gold
area/km2Rock gold
area/km2Quantity Length/km 2004 54 11.482 4.13 0.00 2016 369 67.58 8.05 0.29 -
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