WABOL: A conceptual water balance model for analyzing rainfall water use in olive orchards under different soil and cover crop management strategies

2013 ◽  
Vol 91 ◽  
pp. 35-48 ◽  
Author(s):  
U. Abazi ◽  
I.J. Lorite ◽  
B. Cárceles ◽  
A. Martínez Raya ◽  
V.H. Durán ◽  
...  
Keyword(s):  
Water Balance ◽  
Water Use ◽  
Cover Crop ◽  
Management Strategies ◽  
Crop Management ◽  
Water Balance Model ◽  
Balance Model

scholarly journals GlobWat – a global water balance model to assess water use in irrigated agriculture

2015 ◽  
Vol 19 (9) ◽  
pp. 3829-3844 ◽  
Author(s):  
J. Hoogeveen ◽  
J.-M. Faurès ◽  
L. Peiser ◽  
J. Burke ◽  
N. van de Giesen
Keyword(s):  
Water Balance ◽  
Water Use ◽  
Open Water ◽  
Water Balance Model ◽  
Green Water ◽  
Balance Model ◽  
Irrigated Agriculture ◽  
High Resolution Data ◽  
Food And Agriculture ◽  
Global Water

Abstract. GlobWat is a freely distributed, global soil water balance model that is used by the Food and Agriculture Organization (FAO) to assess water use in irrigated agriculture, the main factor behind scarcity of freshwater in an increasing number of regions. The model is based on spatially distributed high-resolution data sets that are consistent at global level and calibrated against values for internal renewable water resources, as published in AQUASTAT, the FAO's global information system on water and agriculture. Validation of the model is done against mean annual river basin outflows. The water balance is calculated in two steps: first a "vertical" water balance is calculated that includes evaporation from in situ rainfall ("green" water) and incremental evaporation from irrigated crops. In a second stage, a "horizontal" water balance is calculated to determine discharges from river (sub-)basins, taking into account incremental evaporation from irrigation, open water and wetlands ("blue" water). The paper describes the methodology, input and output data, calibration and validation of the model. The model results are finally compared with other global water balance models to assess levels of accuracy and validity.

scholarly journals GlobWat – a global water balance model to assess water use in irrigated agriculture

2015 ◽  
Vol 12 (1) ◽  
pp. 801-838 ◽  
Author(s):  
J. Hoogeveen ◽  
J.-M. Faurès ◽  
L. Peiser ◽  
J. Burke ◽  
N. van de Giesen
Keyword(s):  
Water Balance ◽  
Water Use ◽  
Open Water ◽  
Water Balance Model ◽  
Green Water ◽  
Balance Model ◽  
Irrigated Agriculture ◽  
Global Soil ◽  
Spatially Distributed ◽  
Global Water

Abstract. GlobWat is a freely distributed, global soil water balance model that is used by FAO to assess water use in irrigated agriculture; the main factor behind scarcity of freshwater in an increasing number of regions. The model is based on spatially distributed high resolution datasets that are consistent at global level and calibrated against values for Internal Renewable Water Resources, as published in AQUASTAT, FAO's global information system on water and agriculture. Validation of the model is done against mean annual river basin outflows. The water balance is calculated in two steps: first a "vertical" water balance is calculated that includes evaporation from in situ rainfall ("green" water) and incremental evaporation from irrigated crops. In a second stage, a "horizontal" water balance is calculated to determine discharges from river (sub-)basins, taking into account incremental evaporation from irrigation, open water and wetlands ("blue" water). The paper describes methodology, input and output data, calibration and validation of the model. The model results are finally compared with other global water balance models.

scholarly journals Simple water balance model and crop water demand at different spatial and temporal scales in Periya Pallam catchment of upper Bhavani basin, Tamilnadu

2021 ◽  
pp. 217-224
Author(s):  
A. Raviraj ◽  
Ramachandran J ◽  
Nitin Kaushal ◽  
Arjit Mishra
Keyword(s):  
Water Balance ◽  
Water Use ◽  
Water Demand ◽  
Water Requirement ◽  
Water Balance Model ◽  
Balance Model ◽  
Effective Rainfall ◽  
Rainfall Runoff ◽  
Crop Water ◽  
Crop Water Demand

Reduction in agricultural water use and increasing the sustainability of water resources can be achieved by studying the water balance of the area and crop water demand. In this paper, by using a simple water balance model, Evapotranspiration, Rainfall, Runoff, Water Demand and Water Requirement different crops are estimated. The crop water requirement and crop water demand for different crops grown in the Periya Pallam Catchment of Upper Bhavani Basin, Tamilnadu, was estimated. Water balance estimation of the area reveals that out of the annual rainfall, runoff is estimated to be 129 mm, effective rainfall is 252 mm, and deep percolation is about 67 mm. The demand for water for agriculture in the study area is about 61 million cubic meters (MCM), but only 19 MCM of water is available through precipitation in the form of effective rainfall. Hence, the remaining 43 MCM of water is supplied through groundwater and other sources. The results will pave the way for sustainable crop water use planning and would achieve water security in the basin.

Water balance of three irrigated crops on fine-textured soils of the Riverine Plain

1983 ◽  
Vol 34 (2) ◽  
pp. 183 ◽  
Author(s):  
WK Mason ◽  
WS Meyer ◽  
RCG Smith ◽  
HD Barrs
Keyword(s):  
Water Balance ◽  
Water Use ◽  
Water Table ◽  
Root Length Density ◽  
Capillary Rise ◽  
Water Balance Model ◽  
Balance Model ◽  
Available Water ◽  
Eastern Australia ◽  
Plant Available Water

Three summer crop species, maize, sorghum and sunflower were grown on three different fine-textured soils of the Riverine Plain in south-eastern Australia. At each site, above-ground growth, phenological development, and root length density were measured in two well-watered plots. Water use, plant water status and final crop yield were measured in the well-watered plots and in one plot per site where irrigation was discontinued around the time that complete crop canopies had developed. Plant available water was estimated from these drying-cycle plots. Crop water use calculated from soil water contents did not agree with estimates from a water balance model at two of the sites, suggesting that capillary rise from shallow water tables was supplying considerable quantities of water to the crops. Using the water balance model to predict actual evapotranspiration (Et), we estimated that after complete canopy development, up to 40% of Et was supplied to well-watered crops from a water table at approximately 1.5 m. At the site without a water table, yields from the drying-cycle plots were severely reduced and the estimate of plant available water (PAW) was thought to be realistic. It was concluded that where capillary rise or lateral movement of water into the root zone was significant, the concept of plant available water (PAW) was unsatisfactory.

scholarly journals Comparative analysis of the actual evapotranspiration of Flemish forest and cropland, using the soil water balance model WAVE

2005 ◽  
Vol 9 (3) ◽  
pp. 225-241 ◽  
Author(s):  
W. W. Verstraeten ◽  
B. Muys ◽  
J. Feyen ◽  
F. Veroustraete ◽  
M. Minnaert ◽  
...  
Keyword(s):  
Land Use ◽  
Time Series ◽  
Water Balance ◽  
Soil Water ◽  
Water Use ◽  
Wave Model ◽  
Water Balance Model ◽  
Soil Water Balance ◽  
Balance Model ◽  
Forest Stands

Abstract. This paper focuses on the quantification of the green – vegetation related – water flux of forest stands in the temperate lowland of Flanders. The underlying reason of the research was to develop a methodology for assessing the impact of forests on the hydrologic cycle in comparison to agriculture. The tested approach for calculating the water use by forests was based on the application of the soil water balance model WAVE. The study involved the collection of data from 14 forest stands, the calibration and validation of the WAVE model, and the comparison of the water use (WU) components – transpiration, soil and interception evaporation – between forest and cropland. For model calibration purposes simulated and measured time series of soil water content at different soil depths, period March 2000–August 2001, were compared. A multiple-site validation was conducted as well. Actual tree transpiration calculated with sap flow measurements in three forest stands gave similar results for two of the three stands of pine (Pinus sylvestris L.), but WAVE overestimated the actual measured transpiration for a stand of poplar (Populus sp.). A useful approach to compare the WU components of forest versus cropland is scenario analysis based on the validated WAVE model. The statistical Profile Analysis method was implemented to explore and analyse the simulated WU time series. With an average annual rainfall of 819 mm, the results reveal that forests in Flanders consume more water than agricultural crops. A 30 years average of 491 mm for 10 forests stands versus 398 mm for 10 cropped agricultural fields was derived. The WU components, on yearly basis, also differ between the two land use types (transpiration: 315 mm for forest and 261 mm for agricultural land use; soil evaporation: 47 mm and 131 mm, for forest and cropland, respectively). Forest canopy interception evaporation was estimated at 126 mm, while it was negligible for cropland.

scholarly journals Water use efficiency of flooded rice fields I. Validation of the soil-water balance model SAWAH

1994 ◽  
Vol 26 (4) ◽  
pp. 277-289 ◽  
Author(s):  
M.C.S. Wopereis ◽  
B.A.M. Bouman ◽  
M.J. Kropff ◽  
H.F.M. ten Berge ◽  
A.R. Maligaya
Keyword(s):  
Water Balance ◽  
Water Use Efficiency ◽  
Soil Water ◽  
Water Use ◽  
Water Balance Model ◽  
Rice Fields ◽  
Soil Water Balance ◽  
Balance Model ◽  
Flooded Rice ◽  
Use Efficiency

Assessment of interbasin groundwater flows between catchments using a semi-distributed water balance model

2014 ◽  
Vol 519 ◽  
pp. 1848-1858 ◽  
Author(s):  
Francisco Pellicer-Martínez ◽  
José Miguel Martínez-Paz
Keyword(s):  
Water Balance ◽  
Water Balance Model ◽  
Balance Model
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