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
[ "贾振江(1997-),男,在读硕士研究生,主要从事旱区节水灌溉理论与技术研究。E-mail:2474697460@qq.com" ]
纸质出版:2022
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贾振江, 赵广兴, 李王成, 等. 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.
JIA Zhenjiang, ZHAO Guangxing, LI Wangcheng, et al. Estimation of Soil Evaporation Under Mixed Sand Cover in Arid Regions of Central Ningxia[J]. 2022, 36(2): 219-227.
贾振江, 赵广兴, 李王成, 等. 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. DOI: 10.13870/j.cnki.stbcxb.2022.02.028.
JIA Zhenjiang, ZHAO Guangxing, LI Wangcheng, et al. Estimation of Soil Evaporation Under Mixed Sand Cover in Arid Regions of Central Ningxia[J]. 2022, 36(2): 219-227. DOI: 10.13870/j.cnki.stbcxb.2022.02.028.
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。
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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