基于景观功能评价法(LFA)的5种恢复模式景观功能综合评价:以乌海市典型露天煤矿排土场为例

doi:10.19741/j.issn.1673-4831.2019.0814

Abstract

Abstract: The evaluation of ecological restoration effects of abandoned land in a mining area usually only considers improvement in soil properties by vegetation allocation while few studies have focused on the evaluation and screening of different artificial ecological restoration models from a landscape perspective. Taking the dumping site of the Wuhai open-pit coal mine as a study area, 5 typical recovery modes were selected and the landscape functions of natural shrub communities were used as recovery targets for comparison. The landscape function analysis (LFA) method was adapted and used to evaluate the patch area index (A₁), the landscape structure index (A₂), soil stability (S_a), infiltration (I_f) and the nutrient cycle (N_e) index of the dumping site under different recovery modes, and the weight of each index was calculated by the maximum variance method to obtain the comprehensive evaluation index of the landscape structure function (F_l). The results show the following. (1) The recovery mode of bio-integrated engineering measures is superior to a single mode. (2) Under the mode of artificial grass seed application combined with brick sash slope protection and geonet recovery, the A₁, A₂, S_a, I_f, and N_e reached to the highest values that were 3.2, 1.8, 1.8, 1.7, and 2.4 times as high as those values obtained from artificial grass seed application mode. (3) The value of F_l was the highest under the recovery mode involving artificial grass seed application combined with brick sash slope protection and geonet which is 1.3-1.9 times as high as the values of other recovery modes and 1.6 times as those of the control group. F_l was the lowest under the artificial grass seed application mode, but with no significant difference to that of the control group (P>0.05). Therefore, all the 5 recovery modes can be helpful to achieve the ecological restoration goals of the dump site in this area, and it is best to artificially distribute grass seeds alongside brick sash slope protection and geonet. The results of this research can provide a scientific basis for screening the ecological restoration modes of mining areas in arid desert areas of north-western China and to promote sustainable development.

Key words: landscape function, ecological restoration mode, open pit coal mine dump, Wuhai City

CLC Number:

ZHANG Xin, GUO Xiao-ping, LI Peng-fei, FENG Chang-dong, GUO Guang. Comprehensive Evaluation of Landscape Functions of 5 Restoration Modes Based on the LFA Method: A Case Study of the Dumping Site of a Typical Open-pit Coal Mine in the City of Wuhai.[J]. Journal of Ecology and Rural Environment, 2020, 36(7): 897-904.

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Comprehensive Evaluation of Landscape Functions of 5 Restoration Modes Based on the LFA Method: A Case Study of the Dumping Site of a Typical Open-pit Coal Mine in the City of Wuhai.

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