A Study Of Ecological Restoration Efficiency Evaluation Of The Longfengling Mines Wasteland In Mentougou

In this paper, ecological models of abandoned quarries of Long fengling , Mentougou District in Beijing were took as studied objects. Based on field surveys and field observations, more systematicly analysising of vegetation changes under the measures of the vegetation bag ecological protection, improving soil seedlings reforestation, + foot masonry wall climbing plant vertical green vegetation laying carpet, ecological vegetation filling + laying carpet, + dredging soil ground to sow the seeds of vertical rock face green containers, easy to restore vegetation sprayed with the substrate, two-way grid linking + substrate spraying vegetation restoration echo three-dimensional network linked to the restoration of vegetation + substrate spray-measures . Meanwhile , by fuzzy comprehensive evaluation and AHP method, evaluating the effectiveness of comprehensive two measures of quarries steep. Which provide scientific basis for using abandoned mine reclamation and ecological restoration in Beijing.The results show that:(1) By anlysising important value , The study shows adaptability of Chrysanthemums and legumes are most strongest, the grass and the bindweed are more better, the Rubiaceae and theIris Branch is worst. To recovery quickly wasteland , which can adopt a resuming model of combination with shrubs and grasses . The plant species mainly is Cosmos biginnatus, Astragalus adsurgens Pall, Setaria, Lespedeza formosa (Vog.) Koehne, Pharbitis nil (L.) Choisy, Tripolium vulgare Ness , Verbenaceae.(2) Diversity index shows that G-Sample plot in 3DM vegetation net with base material spraying has the maximal diversity indices which are Shannon-Wiener and Simpson, but Shannon-Wiener diversity index is 2.205 and Simpson diversity index is 0.882. However, Shannon-Wiener diversity index is 1.682 and Simpson diversity index is 0.797 in F-Sample plot which used ecological grouting and vegetation carpet are minimal, so they are the minimum diversity indices.In H-Sample plot with base material spraying in simply vegetation restoration, Pielou evenness index is 0.978 and Alatalo evenness index is 6.281, which are the maximal evenness indices. But Pielou evenness index is 0.916 and Alatalo evenness index is 5.228 in A-Sample plot with ecological vegetation bag, they are the minimal evenness.Both of Richness indices in D-Sample plot which took suspended bidirectional grid with basematerial spraying and G-Sample plot which took suspended 3DM vegetation net with base material spraying are maximal, so Margalef richness index is 9.102 and Patrick richness index is 10 in D-Sample plot. However, they are 5.461 and 6 in F-Sample plot.(3) With different slope restoration treatment in abandoned quarry, Shannon-Wiener and Simpson diversity indices increased gradually, and Pielou and Alatalo evenness indices increased with the time.So diversity index and evenness index have specifically positive correlation with the time, which turn up the peak in August, Septemper and October. The correlation coefficients are both above 0.75. To different slope restoration treatment in abandoned quarry, two richness indices don't change with the time.(4) Under the measure of 3D network link and spraying vegetation Restoration matrix , the comprehensive evaluation score of ecological treatment effectiveness is 7.1548. Under the measure of Two-way grid link , spraying vegetation Restoration matrix and Vegetation blanket, that is 7.1214. The two methods are benefit to wasteland restoration . It suggested that ecological treatment has significant economic and ecological effectiveness and also achieved sustainable use of land.