• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Water Resources, Coastal and Ocean Engineering >Soil water retention curve from saturated hydraulic conductivity for sandy loam and loamy sand textured soils
【24h】

Soil water retention curve from saturated hydraulic conductivity for sandy loam and loamy sand textured soils

机译：砂土壤土饱和水力导电性土壤水保留曲线和壤土砂纹理土壤

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Knowledge of the soil hydraulic properties is indispensable to solve many soil and water management problems related to agriculture, ecology, and environmental issues.Soil hydraulic properties are key factors that regulate the movement of groundwater and transport of solutes.The most important hydraulic properties of soils are the soil water retention curve (SWRC) and saturated hydraulic conductivity (k_s). Determination of these hydraulic properties is needed for many studies and applications related to irrigation, drainage, water movement and solute transport in the soil.Although many advances are made for direct measurements of SWRC and k_s, they are usually time consuming and costly. Some attempts have been made to indirectly predict these hydraulic properties. The objective of this study was to derive an empirical relationship to estimate soil water retention curve from saturated hydraulic conductivity. One hundred and one soil samples were collected from agricultural and forest sites at different depths, at different locations in the Pavanje river basin that lies in the southern coastal region of Karnataka, India. The saturated hydraulic conductivity was measured in the laboratory by variable falling head method using Permeameter and soil water retention curve data was obtained through pressure plate apparatus for all the agricultural and forest soils. Prediction accuracies were evaluated using coefficient of determination, root mean square error, mean error, Akaike Information Criteria, between measured and predicted values.The results obtained from the prediction of soil moisture retention curve from saturated hydraulic conductivity, shows that the developed relationship are reasonably useful to get the soil moisture retention curve for the soils of agricultural and forested hillslopes of the region under consideration.
机译：土壤液压特性的知识是解决与农业，生态和环境问题相关的许多土壤和水管理问题。机构是调节地下水运动和溶质运输的关键因素。土壤中最重要的液压特性土壤保水曲线（SWRC）和饱和液压导电率（K_S）。对于灌溉，排水，水运动和溶质溶液运输的许多研究和应用需要确定这些液压性能。尽管SWRC和K_S的直接测量，但它们通常是耗时和昂贵的许多进展。已经进行了一些尝试以间接预测这些液压性质。本研究的目的是导出经验关系，以估计来自饱和液压导电性的土壤水保持曲线。从不同深度的农业和森林地点收集了一百一和一种土壤样品，位于印度卡纳塔克卡南部沿海地区的Pavanje河流域的不同地点。通过使用偏振计的可变下落的头法测量饱和液压导电性，通过用于所有农业和森林土壤的压力板装置获得土壤水保留曲线数据。使用测定系数，均方根误差，平均误差，akaike信息标准，测量和预测值之间评估预测精度。从饱和液压导率的土壤水分保留曲线预测得到的结果表明，发达的关系是合理的用于在考虑区域的农业和森林山丘的土壤土壤水分保留曲线有用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号