|Table of Contents|

Effects of Biochar and Decomposed Straw on Water Infiltration Into Coal Gangue Matrix

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2025年2
Page:
85-93
Research Field:
Publishing date:

Info

Title:
Effects of Biochar and Decomposed Straw on Water Infiltration Into Coal Gangue Matrix
Author(s):
YE Hangwei1; 2; ZHANG Zheng1; 2; WU Haixia1; LI Xianyao1; 2; WANG Wanwan1; 2; CHEN Yixing1; 2
(1.School of Water Resources and Hydropower，Hebei Engineering University，Handan，Hebei 056038；2.Key Laboratory of Smart Water Resources of Hebei Province,Handan，Hebei 056038)
Keywords:
coal gangue matrix; biochar; mature straw; ecological substrate; infiltration
PACS:
10.11937/bfyy.20242724
DOI:
10.11937/bfyy.20242724
Abstract:
Taking a mixture of coal gangue and vermiculite at mass ratios of 2.5%，5.0% as the test material，the effects of applying biochar (0%，2.5%，5.0%) and mature straw (0%，2.5%，5.0%) at three different application rates on the water infiltration process in coal gangue substrates were studied by employing indoor soil column experiments,in order to provide reference for ecological improvement and new soil moisture regulation in mining areas.The results showed that adding both biochar and mature straw promoted the water infiltration process in coal gangue substrates，with the impact degree being greater for mature straw than for biochar；the wetting front migration depth increased with the increase in biochar application rate，with an increase range of 28.11% to 92.77%.When mature straw was applied compared to the control group (CK)，the overall increase in wetting front migration depth ranged from 19.46% to 94.78%.The relationship between wetting front migration depth and infiltration time followed a power function pattern.Both the addition of biochar and mature straw reduced substrate moisture content；with the increase in biochar application rate，the moisture content of the substrate profile decreased，while with the increase in mature straw application rate，the moisture content of the profile increased.The Philip and Kostiakov infiltration models were able to simulate the water infiltration process in coal gangue substrates under various treatments well.In summary，the application of biochar and mature straw significantly influenced the infiltration performance of coal gangue substrates.

References:

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Last Update: 2025-02-08