Experimental Study of Soil Hydraulic Characteristics Influenced by Infiltration Water Quality

doi:10.13870/j.cnki.stbcxb.2017.04.011

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Experimental Study of Soil Hydraulic Characteristics Influenced by Infiltration Water Quality

更新时间：2025-03-12

- Experimental Study of Soil Hydraulic Characteristics Influenced by Infiltration Water Quality
- Vol. 31, Issue 4, Pages: 64-68(2017)
- 作者机构：
  
  1. 河海大学南方地区高效灌排与农业水土环境教育部重点实验室,南京,210098
  2. 河海大学水利水电学院,南京,210098
  3. 溧阳市国土资源局，江苏溧阳,213300
  4. 江苏省江宁区水利局,南京,210098
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.04.011
  CLC： S152.7+2
- Published：2017
- 稿件说明：
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Experimental Study of Soil Hydraulic Characteristics Influenced by Infiltration Water Quality[J]. 2017, 31(4): 64-68.
DOI：

Experimental Study of Soil Hydraulic Characteristics Influenced by Infiltration Water Quality[J]. 2017, 31(4): 64-68. DOI： 10.13870/j.cnki.stbcxb.2017.04.011.

摘要

为探究不同入渗水水质对土壤导水特性的影响，采用圆盘负压入渗法进行试验研究，选取两种水质（蒸馏水和自来水）对黄壤土和红壤土进行4个压力水头（0，-3，-6，-9 cm）下的圆盘入渗试验。结果表明，随着入渗水电导率的增大，土壤入渗率、吸渗率及导水率均随之增大，且红壤土在不同电导率的入渗水作用下土壤吸渗率的变化差异显著（P＜0.05）。在低水头压力下，两种水质入渗条件下测得的土壤导水率差异显著（P＜0.05）；在高水头压力下，两种水质入渗下测得土壤导水率差异不显著，表明入渗水水质对土壤导水率的影响主要发生在低压力水头下即在细孔隙下的导水特性上。两种土壤的大孔隙与中等孔隙对水流贡献率随入渗水电导率的增大而增大，而小孔隙对水流贡献率随入渗水电导率的增大而减小，入渗水水质对红壤土不同级别孔隙水流贡献率的影响显著（P＜0.05）。研究分析相关参数的变化有利于探讨野外试验时入渗水水质对试验结果的影响，对于正确认识农田水文过程、开发利用劣质水资源、提高农业灌溉灌水质量和灌水效率等具有重要意义。

Abstract

In order to investigate the influence of infiltration water quality on soil hydraulic characteristics

two types of water (distilled and tap water) were selected to carry out in four pressure heads (0

-3

-6

-9 cm) on yellow loam and red loam by using a disc infiltrometer. The results showed that infiltration rate

hydraulic conductivity and sorptivety increased with the increase of the water electrical conductivity

and the soil sorptivety in red loam differed significantly under different conductivity of water (P<0.05). Under the low head pressure

the soil hydraulic conductivity was significantly different between two types of water (P<0.05). By contract

the difference of soil hydraulic conductivity between two types of water was not significant under high head pressure. The influence of water quality on (fine pore) soil hydraulic conductivity was mainly under the low pressure head. The contribution of macropores and medium porosity in the yellow and red loam soils to water flow increased with the increase of the conductivity of water. However

the contribution of the small pores to the flow decreased with the increase of the conductivity of water. Different types of water had significant influence on the contribution rate of different grades of porosity to water flow in red loam (P <0.05). Study of the influence of water quality on soil hydraulic characteristics was beneficial for discussing the influence of water quality on the experimental results

correctly understanding the soil hydrological processes

developing and utilizing low quality water resources

and improving irrigation quality and irrigation efficiency.

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Related Institution

College of Agricultural Science and Engineering， Hohai University

Institute of Soil and Water Conservation, Northwest A&F University, Yangling

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ZHANG Zhi-hua1,CHEN Wei-feng2,SHI Yue-feng3(1.College of Resources Science and Technology,Beijing Normal University,Beijing 100875,2.College of Resources and Environment,Shandong Agricultural University,Taian,Shandong 271018,3.College of Resources and Environmental Sciences,China Agricultural University,)

西北农林科技大学水土保持研究所,陕西杨凌

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