20xx委托書基于gis的礦區(qū)流域生態(tài)安全診斷研究(編輯修改稿)
2025-01-13 22:43 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 ng watershed， this article takes Bijiang watershed as the study area. Bijiang River is a branch of international Lancang river and in the upper reach of Bijiang watershed， it is the Asia’s largest leadzinc mine. Based on the PressureStateResponse （PSR） model and GIS technology， this article constructed the index system of 4 levels and 18 evaluation factors， took 30 m30 m grid as basic evaluation unit， used ecological security prehensive appraisal methods to diagnose the grid cells and the towns’ ecological security after using the entro
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