scholarly journals Corrigendum to "Partitioning of evaporation into transpiration, soil evaporation and interception: A comparison between isotope measurements and a HYDRUS-1D model" published in Hydrol. Earth Syst. Sci., 16, 2605–2616, 2012

2012 ◽  
Vol 16 (9) ◽  
pp. 3261-3261 ◽  
Author(s):  
S. J. Sutanto ◽  
J. Wenninger ◽  
A. M. J. Coenders-Gerrits ◽  
S. Uhlenbrook
Keyword(s):  
Soil Evaporation ◽  
1D Model ◽  
Hydrus 1D ◽  
Isotope Measurements

scholarly journals Partitioning of evaporation into transpiration, soil evaporation and interception: a comparison between isotope measurements and a HYDRUS-1D model

2012 ◽  
Vol 16 (8) ◽  
pp. 2605-2616 ◽  
Author(s):  
S. J. Sutanto ◽  
J. Wenninger ◽  
A. M. J. Coenders-Gerrits ◽  
S. Uhlenbrook
Keyword(s):  
Mass Balance ◽  
Temporal Resolution ◽  
Soil Evaporation ◽  
High Temporal Resolution ◽  
Total Evaporation ◽  
Resolution Analysis ◽  
1D Model ◽  
Isotope Mass Balance ◽  
Hydrus 1D ◽  
Isotope Measurements

Abstract. Knowledge of the water fluxes within the soil-vegetation-atmosphere system is crucial to improve water use efficiency in irrigated land. Many studies have tried to quantify these fluxes, but they encountered difficulties in quantifying the relative contribution of evaporation and transpiration. In this study, we compared three different methods to estimate evaporation fluxes during simulated summer conditions in a grass-covered lysimeter in the laboratory. Only two of these methods can be used to partition total evaporation into transpiration, soil evaporation and interception. A water balance calculation (whereby rainfall, soil moisture and percolation were measured) was used for comparison as a benchmark. A HYDRUS-1D model and isotope measurements were used for the partitioning of total evaporation. The isotope mass balance method partitions total evaporation of 3.4 mm d−1 into 0.4 mm d−1 for soil evaporation, 0.3 mm d−1 for interception and 2.6 mm d−1 for transpiration, while the HYDRUS-1D partitions total evaporation of 3.7 mm d−1 into 1 mm d−1 for soil evaporation, 0.3 mm d−1 for interception and 2.3 mm d−1 for transpiration. From the comparison, we concluded that the isotope mass balance is better for low temporal resolution analysis than the HYDRUS-1D. On the other hand, HYDRUS-1D is better for high temporal resolution analysis than the isotope mass balance.

scholarly journals Partitioning of evaporation into transpiration, soil evaporation and interception: a combination of hydrometric measurements and stable isotope analyses

2012 ◽  
Vol 9 (3) ◽  
pp. 3657-3690 ◽  
Author(s):  
S. J. Sutanto ◽  
J. Wenninger ◽  
A. M. J. Coenders-Gerrits ◽  
S. Uhlenbrook
Keyword(s):  
Water Balance ◽  
Best Practice ◽  
Soil Evaporation ◽  
Total Evaporation ◽  
Relative Contribution ◽  
Security Problem ◽  
1D Model ◽  
Use Efficiency ◽  
Monteith Equation ◽  
Hydrus 1D

Abstract. Best practice agriculture is the key to overcome the food security problem through improvement of water use efficiency. Therefore, knowledge of the water fluxes within the soil-vegetation-atmosphere system is crucial. Many studies have tried to quantify these fluxes, but they encountered difficulties in quantifying the relative contribution of evaporation and transpiration. In this study, we compared four different methods to estimate evaporation fluxes during simulated summer conditions in a grassland lysimeter in the UNESCO-IHE laboratory. Only two of these methods can be used to partition total evaporation into transpiration, soil evaporation and interception. A water balance calculation (whereby rainfall, soil moisture and percolation was measured) and the Penman-Monteith equation were applied to determine total evaporation. A HYDRUS-1D model and isotope measurements were used for the partitioning of total evaporation. The average total evaporation was 3.2 mm d−1 calculated with the water balance, 3.4 mm d−1 for the Penman-Monteith equation, 3.4 mm d−1 calculated with HYDRUS-1D, and 3.1 mm d−1 with the isotope mass balance. By use of the isotopes, we separated the total evaporation on average into 2.4 mm d−1 transpiration (77.7%), 0.4 mm d−1 soil evaporation (12.2%), and 0.3 mm d−1 interception (10.1%).

Sensitivity and uncertainty analysis of the HYDRUS-1D model for root water uptake in saline soils

2018 ◽  
Vol 69 (2) ◽  
pp. 163 ◽  
Author(s):  
Wenzhi Zeng ◽  
Guoqing Lei ◽  
Yuanyuan Zha ◽  
Yuanhao Fang ◽  
Jingwei Wu ◽  
...  
Keyword(s):  
Salt Stress ◽  
Water Uptake ◽  
Soil Salinity ◽  
Root Water Uptake ◽  
Stress Factors ◽  
Saline Soils ◽  
Growth Stages ◽  
1D Model ◽  
Maximum Root ◽  
Hydrus 1D

A variance-based global sensitivity analysis (extended Fourier amplitude sensitivity test, EFAST) was applied to the Feddes module of the HYDRUS-1D model, and the sensitivity indices including both main and total effects of actual root water uptake (RWUa) to seven Feddes parameters were quantified at different growth stages of sunflower (Helianthus annuus L.): seedling, bud, flowering and maturity. The effects of soil salinity, climate conditions, and crop root growth on parameter sensitivity were explored by analysing three precipitation frequencies and two maximum root depths across four field locations with different soil salinity levels in China’s sunflower-growing regions. Uncertainties for RWUa were evaluated at four stages with varying Feddes parameters for different field locations, precipitation frequencies and maximum root depths. We found that the water stress factor concerning ceasing root water uptake (h4), and two salt stress factors ht and Sp, indicating the salinity threshold and the slope of the curve determining the fractional decline in root water uptake per unit increase in salinity below the threshold, respectively, were three most important Feddes parameters for RWUa estimation in HYDRUS-1D. In addition, the effects of soil salinity and precipitation frequencies were stronger than maximum root depth on the order of the parameters’ impacts on RWUa. Our study suggested that h1, h2, h3h, and h3l might be determined by an economical method (e.g. literature review) in saline soils with limited observations, but it is better to calibrate wilting point (h4) and salt stress parameters (ht and Sp) based on local measurements.

scholarly journals Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1624 ◽  
Author(s):  
Lijian Zheng ◽  
Juanjuan Ma ◽  
Xihuan Sun ◽  
Xianghong Guo ◽  
Qiyun Cheng ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Water Use Efficiency ◽  
Water Use ◽  
Water Uptake ◽  
Root Water Uptake ◽  
Surface Irrigation ◽  
Apple Trees ◽  
1D Model ◽  
Use Efficiency ◽  
Hydrus 1D

The future production of irrigated fruit orchards in the Loess Plateau of China is threatened by a shortage of freshwater. To improve water use efficiency under conditions where irrigation is limited, it is necessary to quantify the root water uptake (RWU) of apple trees. The RWU of apple trees was estimated under surface irrigation using water stable isotope technology and the Hydrus-1D model. Using the Romero-Saltos and IsoSource models, the stable isotopes of water in stems, different soil depths, and different precipitation were analyzed in a 5-year-old dwarfing apple orchard during two seasons 2016 and 2017. Hydrus-1D model was able to simulate the RWU of apple using the maximum coefficient of determination (0.9), providing a root mean square error of 0.019 cm3 cm−3 and a relative error of 2.25%. The results showed that the main depth of RWU ranged from 0–60 cm during the growth season, with the main contribution occurring in the 0–40 cm depth. These findings indicated that reducing the traditional surface irrigation depth will be important for improving the irrigation water use efficiency.

scholarly journals SENSITIVITY OF THE HYDRUS-1D MODEL TO CHANGES IN HYDRODYNAMIC PARAMETERS IN YELLOW LATOSOL

2019 ◽  
Vol 12 (3) ◽  
pp. 467
Author(s):  
Marco Aurelio Calixto Ribeiro de Holanda ◽  
Willames De Albuquerque Soares ◽  
Simone Rosa da Silva ◽  
Diogo Botelho Correa de Oliveira
Keyword(s):  
Hydrodynamic Parameters ◽  
1D Model ◽  
Hydrus 1D

Water budget components estimation for a mature citrus orchard of southern China based on HYDRUS-1D model

2021 ◽  
Vol 243 ◽  
pp. 106426
Author(s):  
Anguo Tu ◽  
Songhua Xie ◽  
Minghao Mo ◽  
Yuejun Song ◽  
Ying Li
Keyword(s):  
Water Budget ◽  
Southern China ◽  
Citrus Orchard ◽  
1D Model ◽  
Hydrus 1D
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