Ecosystem Recovery for Revegetation of Mined-out Quarry recovery of an environmental preservation function

在确定矿山采空岩质边坡生态恢复的植被恢复方案时，需要从环境影响评价的角度对生态恢复程度进行评价，本文以树木高度作为生态恢复指标，利用植物模拟图像对生态恢复程度进行了初步研究，首先，以树木高度作为生态恢复的指标，对生态恢复程度进行了评价。利用虚拟现实系统（VRS），对护堤区仅有树木生长的情况下，利用植物模拟图像进行景观评价实验。然后，同样的实验进行了树木生长的情况下，两个护堤和斜坡地区使用植物模拟图像与照片蒙太奇。两个实验均采用评定量表法进行。主要研究结果如下：（1）当护堤区只种植树木时，生态系统恢复程度随高度比的增加而增加。2）在坡面和护堤上都有树木生长的情况下，生态系统恢复程度与高度比成正比。3）两种情况下，生态系统恢复程度均随高度比的增加而增加; 4）在护堤和坡面上均生长树木的情况下，生态系统恢复程度是护堤上仅生长树木情况的一半。在这种情况下，与仅在护堤区生长树木的情况相比，可以大大缩短生态系统恢复的时间。

In deciding upon a revegetation plan for ecosystem recovery of rock slope of mined-out quarry, it is necessary to evaluate the degree of ecosystem recovery from a viewpoint of an environmental impact assessment.Fundamental studies on evaluation of the degree of ecosystem recovery were carried out using plant simulation image with tree's height as an index of ecosystem recovery.First, the landscape evaluation experiments were carried out in case of trees grow on the berm area only using plant simulation image with Virtual Reality System (VRS). Then the same experiments were carried out in case of trees grow on both berms and slope area using plant simulation image with photomontage. Both experiments were carried out by using Rating Scale Method. The main results obtained in this study are summarized as follows:1) In case of trees grow on the berm area only, the degree of ecosystem recovery increase with height ratio increase. It became clear that the height ratio at the state of almost ecosystem recovery was 1.2.2) In case of trees grow on both berms and slope area, the degree of ecosystem recovery increase in proportion to height ratio. It became clear that the height ratio at the state of almost ecosystem recovery was 0.6.3) In both cases, the degree of ecosystem recovery increase with height ratio increase.4) The case of trees grow on both berms and slope area, the degree of ecosystem recovery is half of the case of trees on the berm area only. In this case, It is possible to shorten the term very much for ecosystem recovery compared with the case of trees grow on the berm area only.