普朗铜矿区土壤水分运移动态监测与数值模拟研究

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中文摘要：揭示矿区土壤水分特性对生态环境保护具有重要意义.本文基于2023年普朗铜矿草地未采区、草地裂缝区、林地未采区、林地裂缝区不同深度土壤水分监测数据,构建了4个地块的Hydrus-1d土壤水分运移模型,模拟典型降雨事件下矿区不同地块水分通量演变特征及包气带水分入渗深度.结果表明:土壤水分模拟决定系数R2均大于0.6,平均绝对误差RMSE和均方根误差MAE均小于1,建立的普朗铜矿区土壤水分运移模型具有较高的准确度.埋深20 cm处土壤水分通量最大,随着土层深度的加深,各地块土层土壤水分通量均呈明显下降趋势;埋深0～120 cm范围内草地裂隙区、林地裂隙区的土壤水分通量比草地未采区和林地未采区相应提高了3.52%和5.79%;草地平均水分通量(4.07%)大于林地(2.86%).相同降雨条件下,草地裂缝区入渗深度最大,林地未采区入渗深度最小;单次降雨量达35 mm才能对深层地下含水层进行补给.

外文标题：Dynamic monitoring and numerical simulation of soil moisture transport in the Pulang Copper Mine area

外文摘要：Revealing the soil moisture characteristics in the mining area is of great significance for ecological environmental protection.Based on the monitoring data of soil moisture at different depths in the grassland unmined area,grassland fissure area,woodland unmined area,and woodland fissure area of the Pulang Copper Mine in 2023,Hydrus-1d soil moisture transport model was constructed for four locations to simulate the evolution characteristics of moisture fluxes in different plots of the mine area and the depth of moisture infiltration into the air-packed zone under typical rainfall events.The results show that:(1)the soil moisture simulation coefficient of determination R2 is greater than 0.6,the average absolute error RMSE and root mean square error MAE are less than 1,and the established soil transport model of Pulang Copper Mining Area has a high accuracy.(2)The soil moisture flux at the burial depth of 20 cm was the largest,and with the deepening of the soil depth,the soil moisture flux of the soil layer of each plot showed a significant decreasing trend;the soil moisture flux of the grassland fissure area and the woodland fissure area within the range of burial depth of 0-120 cm was 3.52%and 5.79%higher than that of the unmined area of the grassland and the unmined area of the woodland,correspond-ingly;the average moisture flux of the grassland(4.07%)was larger than woodland(2.86%).(3)Under the same rainfall conditions,the infiltration depth was greatest in the grassland fissure area and smallest in the forested unmined area;the deep underground aquifer could not be recharged until a single rainfall of 35 mm.

外文关键词：

Pulang Copper Minefield monitoringmoisture transport modelingrainfall infiltrationnumeri-cal simulation

作者：

龙晓峰、贺勇、张召、陈科平、金福喜、魏贺、张可能

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作者单位：

有色金属成矿预测与地质环境监测教育部重点实验室,湖南长沙 410083

中南大学地球科学与信息物理学院,湖南长沙 410083

关键词：

普朗铜矿现场监测水分运移模型降雨入渗数值模拟

基金：

云南迪庆有色金属有限责任公司科研项目湖南省杰出青年科学基金中南大学创新驱动计划湖南省自然资源厅自然资源一般项目

项目编号：

DQYSZYB-09-20210012024JJ20702023CXQD0442022-30

出版年：

2024

DOI：

10.20008/j.kckc.202408014

矿产勘查

有色金属矿产地质调查中心

矿产勘查

CSTPCD

影响因子：0.686

ISSN：1674-7801

年,卷(期)：2024.15(8)