基于黏粒量的土壤水分特征曲线预测模型
【目的】建立基于黏粒量的土壤水分特征曲线预测模型。【方法】设计12种不同黏粒量的质量混合比处理，获得一系列合成土样，通过测定合成土样的土壤水分特征曲线，研究了在体积质量一致的条件下，黏粒量对土壤水分特征曲线参数和孔隙分布的影响。【结果】在体积质量为1.55 g/cm3条件下，黏粒量增加1.9倍，土壤中传导孔隙（0.03~1 mm）体积减小28.6%，储存孔隙（200 nm~0.03 mm）体积增加6倍，土体的持水性增强。合成土样的土壤水分特征曲线参数θs和α均与黏粒量显著正线性相关，θr与黏粒量显著负线性相关，n和m均与黏粒量呈指数衰减关系。【结论】基于黏粒量确定的土壤水分特征曲线预测模型具有...
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| Published in | Guanʻgai paishui xuebao Vol. 40; no. 3; pp. 9 - 14 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | Chinese |
| Published |
Xinxiang City
Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
01.03.2021
宁夏大学土木与水利工程学院,银川 750021%宁夏大学土木与水利工程学院,银川 750021 宁夏节水灌溉与水资源调控工程技术研究中心,银川 750021 宁夏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 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-3317 |
| DOI | 10.13522/j.cnki.ggps.2019243 |
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| Abstract | 【目的】建立基于黏粒量的土壤水分特征曲线预测模型。【方法】设计12种不同黏粒量的质量混合比处理，获得一系列合成土样，通过测定合成土样的土壤水分特征曲线，研究了在体积质量一致的条件下，黏粒量对土壤水分特征曲线参数和孔隙分布的影响。【结果】在体积质量为1.55 g/cm3条件下，黏粒量增加1.9倍，土壤中传导孔隙（0.03~1 mm）体积减小28.6%，储存孔隙（200 nm~0.03 mm）体积增加6倍，土体的持水性增强。合成土样的土壤水分特征曲线参数θs和α均与黏粒量显著正线性相关，θr与黏粒量显著负线性相关，n和m均与黏粒量呈指数衰减关系。【结论】基于黏粒量确定的土壤水分特征曲线预测模型具有较高的精度，能够快速预测土壤水分特征曲线，预测值与实测值之间相对误差＜15%。 |
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| AbstractList | 【目的】建立基于黏粒量的土壤水分特征曲线预测模型。【方法】设计12种不同黏粒量的质量混合比处理，获得一系列合成土样，通过测定合成土样的土壤水分特征曲线，研究了在体积质量一致的条件下，黏粒量对土壤水分特征曲线参数和孔隙分布的影响。【结果】在体积质量为1.55 g/cm3条件下，黏粒量增加1.9倍，土壤中传导孔隙（0.03~1 mm）体积减小28.6%，储存孔隙（200 nm~0.03 mm）体积增加6倍，土体的持水性增强。合成土样的土壤水分特征曲线参数θs和α均与黏粒量显著正线性相关，θr与黏粒量显著负线性相关，n和m均与黏粒量呈指数衰减关系。【结论】基于黏粒量确定的土壤水分特征曲线预测模型具有较高的精度，能够快速预测土壤水分特征曲线，预测值与实测值之间相对误差＜15%。 S152.3; [目的]建立基于黏粒量的土壤水分特征曲线预测模型.[方法]设计12种不同黏粒量的质量混合比处理,获得一系列合成土样,通过测定合成土样的土壤水分特征曲线,研究了在体积质量一致的条件下,黏粒量对土壤水分特征曲线参数和孔隙分布的影响.[结果]在体积质量为1.55 g/cm3条件下,黏粒量增加1.9倍,土壤中传导孔隙(0.03～1 mm)体积减小28.6％,储存孔隙(200 nm～0.03 mm)体积增加6倍,土体的持水性增强.合成土样的土壤水分特征曲线参数θs和α均与黏粒量显著正线性相关,θr与黏粒量显著负线性相关,n和m均与黏粒量呈指数衰减关系.[结论]基于黏粒量确定的土壤水分特征曲线预测模型具有较高的精度,能够快速预测土壤水分特征曲线,预测值与实测值之间相对误差<15％. |
| Author | Tian, XIA TIAN Juncang |
| AuthorAffiliation | 宁夏大学土木与水利工程学院,银川 750021%宁夏大学土木与水利工程学院,银川 750021;宁夏节水灌溉与水资源调控工程技术研究中心,银川 750021;宁夏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 |
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| Author_FL | XIA Tian TIAN Juncang |
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| ClassificationCodes | S152.3 |
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| Copyright | Copyright Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 2021 Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| Keywords | 水分特征曲线 模型 黏粒量 土壤 |
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| Publisher | Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 宁夏大学土木与水利工程学院,银川 750021%宁夏大学土木与水利工程学院,银川 750021 宁夏节水灌溉与水资源调控工程技术研究中心,银川 750021 宁夏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 |
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| Snippet | 【目的】建立基于黏粒量的土壤水分特征曲线预测模型。【方法】设计12种不同黏粒量的质量混合比处理，获得一系列合成土样，通过测定合成土样的土壤水分特征曲线，研究了在体积质... S152.3; [目的]建立基于黏粒量的土壤水分特征曲线预测模型.[方法]设计12种不同黏粒量的质量混合比处理,获得一系列合成土样,通过测定合成土样的土壤水分特征曲线,研究了在... |
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| SubjectTerms | Bulk density Clay Clay soils Curve fitting Diameters Impact analysis Mathematical models Moisture content Parameters Pore size Pore size distribution Pores Retention Sandy soils Size distribution Soil analysis Soil erosion Soil structure Soil water Solute transport Water flow |
| Title | 基于黏粒量的土壤水分特征曲线预测模型 |
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