Soil water content on drip irrigated cotton: comparison of measured and simulated values obtained with the Hydrus 2-D model

被引：0
作者：
Vinicius Bof Bufon
Robert J. Lascano
Craig Bednarz
Jill D. Booker
Dennis C. Gitz
机构：
[1] Water Resources and Irrigation,Wind Erosion & Water Conservation Unit
[2] USDA-ARS,Cotton Breeding Station
[3] Bayer CropScience,undefined
来源：
Irrigation Science | 2012年 / 30卷
关键词：
Root Mean Square Deviation; Leaf Area Index; Irrigation Treatment; Mean Square Deviation; Time Domain Reflectometry;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Crop irrigation with subsurface drip (SDI) is increasing in the semiarid Texas High Plains (THP). Information on drip-tubing positioning, irrigation strategies, and wetted soil area is needed to increase rainwater effectiveness when well capacities are inadequate to meet full irrigation requirements. Time and resources necessary to test SDI strategies for different conditions through field experimentation is too large. However, a mechanistic model such as Hydrus-2D can quantify the effect of different installation geometries and irrigation strategies. Our objective was to experimentally validate the Hydrus-2D in an Amarillo soil in THP so that the model can be used to evaluate different irrigation frequency and timing strategies for SDI cotton. Results showed that Hydrus-2D simulated volumetric soil water content within ±3% of measured values, and simulation bias represented the smaller portion of the simulation error, indicating that the model can be used to evaluate irrigation strategies.
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页码：259 / 273
页数：14
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