文章摘要
贾振江, 赵广兴, 李王成, 安文举, 刘巧玲, 李阳阳, 徐天渊.宁夏中部干旱带砂土混合覆盖下土壤蒸发估算[J].水土保持学报,2022,36(2):219~227
宁夏中部干旱带砂土混合覆盖下土壤蒸发估算
Estimation of Soil Evaporation Under Mixed Sand Cover in Arid Regions of Central Ningxia
投稿时间:2021-10-06  
DOI:10.13870/j.cnki.stbcxb.2022.02.028
中文关键词: 压砂地  土壤蒸发  水面蒸发  表层土壤含水量  宁夏中部干旱带
英文关键词: gravel-mulched land  soil evaporation  water surface evaporation  surface soil water content  arid regions of central Ningxia
基金项目:国家自然科学基金项目(51869023);宁夏自然科学基金重点项目(2021AAC02008);宁夏重点研发计划项目(引才专项)(2019BEB04029);宁夏高等学校一流学科建设(水利工程学科)项目(NXYLXK2021A03);宁夏自治区级青年拔尖人才项目(030103030008);宁夏重点研发计划项目(2019BEH03010);宁夏大学研究生创新项目(GIP2021-27)
作者单位E-mail
贾振江1, 赵广兴1, 李王成1,2,3, 安文举1, 刘巧玲1, 李阳阳1, 徐天渊4 1. 宁夏大学土木与水利工程学院, 银川 750021

2. 宁夏节水灌溉与水资源调控工程技术研究中心
, 银川 750021

3. 旱区现代农业水资源高效利用教育部工程研究中心
, 银川 750021

4. 陕西省水利电力勘测设计研究院
, 西安 710000 
liwangcheng@126.com 
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中文摘要:
      为寻求一种能够有效估算宁夏中部干旱带压砂地土壤蒸发量的方法,通过微型蒸渗仪大田试验,研究了0(S1),20%(S2),40%(S3),60%(S4),80%(S5),100%(S6)6种砂土混合比条件下土水蒸发比与表层土壤含水量的关系,并构建了压砂地土壤蒸发量估算模型。结果表明:土水蒸发比随表层土壤含水量呈分阶段变化,即S2~S6为2个阶段,S1为3个阶段,且S1第2,3阶段与其余处理相比存在一定滞后性,表层土壤含水量临界值可用砂土混合比表示为θsi=0.0030si2-0.1705si+14.7340;S1~S6土壤蒸发量在第1,2阶段分别可用Es=E0(aiθi+bi),Es=E0(aiθi2+biθi+ci)进行表示(其中,S1第2,3阶段均为Es=E0(aiθi2+biθi+ci)),且整体精度达85%以上;在此基础上进一步综合水面蒸发量、表层土壤含水量及砂土混合比分两阶段构建了二次抛物面模型及多项式模型,模型整体可靠性较高,可为当地水资源管理提供参考。
英文摘要:
      In order to find a method that can estimate the soil evaporation of gravel-mulched land in arid regions of central Ningxia effectively, the relationship between soil water evaporation ratio and surface soil water content under six sand-soil mixing ratios of 0 (S1), 20% (S2), 40% (S3), 60% (S4), 80% (S5), and 100% (S6) was studied, and the estimation model of soil evaporation of gravel-mulched land was constructed by setting up micro-lysimeters. The results indicated that the soil water evaporation ratio changed in stages with the surface soil water content, that was, S2~S6 had two stages, S1 had three stages, and there was a certain lag in the second and third stages of S1 compared with other treatments. The critical value of surface soil water content could be expressed as θsi=0.0030si2-0.1705si+14.7340; The first and second stages of soil evaporation of S1~S6 could be expressed as Es=E0(aiθi+bi) and Es=E0(aiθi2+biθi+ci), respectively, (the second and third stages of S1 were Es=E0(aiθi2+biθi+ci)), and the overall accuracy was above 85%. Based on the above, the quadratic paraboloid model and polynomial model were constructed in two stages by further integrating water surface evaporation, surface soil water content, and sand-soil mixing ratios. The reliability of the model was high, and it could provide reference for local water resources management.
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