Study on Water Holding Characteristics of Litter in Different Vegetation Types in the Reclaimed Land of Open-cut Coal Mine Dump

Lü Gang1; FU Xinyang1; LI Yexin2; SONG Ziling1

doi:10.13870/j.cnki.stbcxb.2017.01.025

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Study on Water Holding Characteristics of Litter in Different Vegetation Types in the Reclaimed Land of Open-cut Coal Mine Dump

更新时间：2025-03-12

- Study on Water Holding Characteristics of Litter in Different Vegetation Types in the Reclaimed Land of Open-cut Coal Mine Dump
- Vol. 31, Issue 1, Pages: 146-152(2017)
- 作者机构：
  
  1. 辽宁工程技术大学环境科学与工程学院,辽宁,阜新,123000
  2. 辽宁工程技术大学矿业学院,辽宁,阜新,123000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.01.025
  CLC： S152.7;S714.7
- Published：2017
- 稿件说明：
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Lü Gang1, FU Xinyang1, LI Yexin2, et al. Study on Water Holding Characteristics of Litter in Different Vegetation Types in the Reclaimed Land of Open-cut Coal Mine Dump[J]. 2017, 31(1): 146-152.
DOI：

Lü Gang1, FU Xinyang1, LI Yexin2, et al. Study on Water Holding Characteristics of Litter in Different Vegetation Types in the Reclaimed Land of Open-cut Coal Mine Dump[J]. 2017, 31(1): 146-152. DOI： 10.13870/j.cnki.stbcxb.2017.01.025.

摘要

为揭示露天煤矿排土场复垦区不同植被类型水土保持效益，选取刺槐林地、榆树林地、混交林地（刺槐和榆树混交）、灌木林地（紫穗槐）和荒草地这5种典型复垦植被下的枯落物作为研究对象，采用室内浸水法对5种植被类型枯落物的持水特性进行研究。结果表明：5个样地的枯落物厚度、蓄积量均表现为：乔木林地＞灌木林地＞荒草地，枯落物厚度在0.80～1.64 cm之间，总蓄积量在0.72～7.51 t/hm2之间；枯落物最大持水量和有效拦蓄能力均表现为刺槐林地最大，枯落物最大持水率为145.58%～206.58%，最大持水量为13.11～123.98 t/hm2，有效拦蓄率为119.74%～166.05%，有效拦蓄量为10.09～98.76 t/hm2；林地枯落物持水量与浸泡时间的关系为Q=aln t+b；枯落物在0～1 h吸水速率内最大，1～4 h内吸水速率急剧下降，随后下降幅度逐渐减小，枯落物吸水速率与浸泡时间关系式为：V=atb。研究结果可为评价露天煤矿排土场不同类型复垦区枯落物层水源涵养效益提供参考，为排土场植被恢复与重建提供科学依据。

Abstract

In order to investigate the beneficial regulations of soil and water conservation in different vegetation types of reclamation areas of open-cut coal mine dump

the research about the vegetation litter was carried out in the 5 typical vegetations of the reclaimed land

including Robinia pseudoacacia， Ulmus pumila， mixed forests (Robinia pseudoacacia and Ulmus pumila)

shrub and weeds

by means of cutting ring method. The results showed that the litter thickness and cumulated amount in 5 sample areas were in the order of forest>shrub>weeds land. The litter thickness was ranged from 0.8 cm to 1.64 cm

the cumulated litter amount was ranged from 0.72 t/hm2to 7.51 t/hm2; the maximum water holding capacity and water conservation ability of litter showed Robinia pseudoacacia maximum

the maximum water-holding rate of litter was 145.58%~206.58%

the maximum water-holding capacity was 13.11 t/hm2~123.98 t/hm2

the effective interception rate was 119.74%~166.05%

the effective interception was 10.09 t/hm2~98.76 t/hm2. The relationship of forest land between litter water-holding capacity and the immersion time was logarithmic function (Q=aln t+b). The litter water absorption rate reached the maximum value at first 0 h ~1 h

then the water absorption rate rapidly decreased in 1 h ~4 h

and finally decreased gradually. The relationship between litter absorption rate and immersion time was power function (V=atb). The study would provide reference for evaluating the water conservation efficiency of litter layer in different reclamation areas of open-cut coal mine dump

and provided scientific basis for the vegetation restoration and reconstruction of the dump.

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