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

在确定采空场岩质边坡生态系统恢复植被方案时，需要从环境影响评价的角度对采空场岩质边坡生态系统恢复程度进行评价。利用植物模拟影像，以树高作为生态系统恢复的指标，开展了生态系统恢复程度评价的基础研究。首先，利用虚拟现实系统（Virtual Reality System， VRS）的植物模拟图像，进行了仅在护坡区有树木生长情况下的景观评价实验。然后利用植物模拟图像和photomontage进行了同样的实验。实验均采用评定量表法进行。主要研究结果如下：1)当树木仅生长在护坡上时，生态系统的恢复程度随高比的增加而增加；可以看出，在生态系统几乎恢复的状态下，高比为1.2.2)当护坡区和坡地都有树木生长时，生态系统的恢复程度与高比成正比。在两种情况下，随着高度比的增加，生态系统的恢复程度都有所增加。(4)护坡区和护坡区均有树木的情况下，生态系统的恢复程度只有护坡区有树木的情况的一半。在这种情况下，与仅在护坡区生长树木的情况相比，有可能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.