scholarly journals Forecasting daily net irrigation requirement maps of India using an ArcGIS toolbar

2012 ◽  
Author(s):  
A. Bandyopadhyay ◽  
K. Mahendra ◽  
N. S. Raghuwanshi
Keyword(s):  
Irrigation Requirement

Historical and future trends in evapotranspiration components and irrigation requirement of winegrapes

2020 ◽  
Vol 26 (4) ◽  
pp. 312-324
Author(s):  
V. Phogat ◽  
J.W. Cox ◽  
D. Mallants ◽  
P.R. Petrie ◽  
D.P. Oliver ◽  
...  
Keyword(s):  
Future Trends ◽  
Irrigation Requirement

Economic Implications of Soybean Maturity Group, Herbicide Program, and Irrigation Requirement

cftm ◽  
2016 ◽  
Vol 2 (1) ◽  
pp. 1-11
Author(s):  
Ryan Wegerer ◽  
Michael Popp ◽  
Xiaoyan Hu ◽  
Larry C. Purcell
Keyword(s):  
Irrigation Requirement ◽  
Maturity Group ◽  
Economic Implications

Assessing irrigation requirements in the Ord Sugar Industry using a simulation modelling approach

1998 ◽  
Vol 38 (4) ◽  
pp. 345 ◽  
Author(s):  
R. C. Muchow ◽  
B. A. Keating
Keyword(s):  
Soil Water ◽  
Sugar Industry ◽  
Irrigation Schedule ◽  
Climatic Data ◽  
Irrigation Water Requirement ◽  
Irrigation Requirement ◽  
Management Options ◽  
Water Requirements ◽  
Irrigation Requirements ◽  
Modelling Approach

Summary. Sustainable irrigation guidelines that maximise profitability and minimise water losses and accession to the watertable are required for the new Ord Sugar Industry. In addition, knowledge on crop water requirements is needed to guide water allocation and costing policies for the expanding Ord Irrigation Area where sugarcane is likely to be a dominant crop. Field data indicating water requirements for sugar in the Ord Irrigation Area are few and this paper deploys a modelling approach to extrapolate from knowledge of water requirements in other parts of the world. The approach links long-term climatic data with soil water characteristics of the main soil type, with a cropping systems model, to develop indicative estimates of irrigation water requirement and yield consequences for different management options for sugarcane production in the Ord. Analyses of the growth of 12-month old ratoon crops were conducted using the APSIM–Sugarcane model with historical climatic data from 1960 to 1985 and either a deep (188 mm available water to 160 cm depth) or shallow (144 mm of water to 120 cm depth) Cununurra clay soil. Under maximum attainable growth conditions where crops were irrigated after half the soil water supply was depleted, average sucrose yield ranged from 26.7 to 29.0 t/ha, and the irrigation requirement (assuming 100% application efficiency) ranged from 22.7 to 23.8 ML/ha depending on ratooning date. Soil water holding capacity had a major effect on the number of irrigations and the interval between irrigation for a given irrigation schedule but little effect on yield or irrigation requirement. Varying the irrigation schedule by changing the level of soil water depletion before irrigation and thus the irrigation frequency, showed the tradeoff between yield and irrigation requirement with the most profitable irrigation schedule depending on the price of sucrose and the cost of irrigation relative to other costs. Most of the year-to-year variation in irrigation water requirement could be explained by the highly variable effectiveness in soil storage of rainfall which ranged from 44 to 93%. This study has provided insight and indicative estimates of the yield and irrigation requirements for different irrigation management options for use in the establishment of an Ord River sugar industry. These estimates will be further refined as field data become available.

Irrigation Requirement of Crops under Changing Climatic Scenarios in a Semi-arid Region of Northern Karnataka

2016 ◽  
Vol 31 (2) ◽  
pp. 51
Author(s):  
R. Rejani ◽  
K.V. Rao ◽  
M.S. Shirahatti ◽  
V.S. Surakod ◽  
P. Yogitha ◽  
...  
Keyword(s):  
Arid Region ◽  
Irrigation Requirement ◽  
Climatic Scenarios ◽  
Semi Arid Region ◽  
Semi Arid

Assessment of the uncertainty related to irrigation modeling by a land surface model across India

2020 ◽  
Author(s):  
Dazhi Li ◽  
Xujun Han ◽  
Dhanya C.t. ◽  
Stefan Siebert ◽  
Harry Vereecken ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Land Surface ◽  
Monsoon Season ◽  
Land Surface Model ◽  
Surface Fluxes ◽  
Spatiotemporal Pattern ◽  
Surface Model ◽  
Irrigation Requirement ◽  
Community Land Model ◽  
Surface Models

<p>Irrigation is very important for maintaining the agricultural production and sustaining the increasing population of India. The irrigation requirement can be estimated with land surface models by modeling water storage changes but the estimates are affected by various uncertainties such as regarding the spatiotemporal distribution of areas where and when irrigation is potentially applied. In the present work, this uncertainty is analyzed for the whole Indian domain. The irrigation requirements and hydrological fluxes over India were reconstructed by multiple simulation experiments with the Community Land Model (CLM) version 4.5 for the year of 2010.</p><p>These multiple simulation scenarios showed that the modeled irrigation requirement and the land surface fluxes differed between the scenarios, representing the spatiotemporal uncertainty of the irrigation maps. Using a season-specific irrigation map resulted in a higher transpiration-evapotranspiration ratio (T/ET) in the pre-monsoon season compared to the application of a static irrigation map, which implies a higher irrigation efficiency. The remote sensing based evapotranspiration products GLEAM and MODIS ET were used for comparison, showing a similar increasing ET-trend in the pre-monsoon season as the irrigation induced land surface modeling. The correspondence is better if the seasonal irrigation map is used as basis for simulations with CLM. We conclude that more accurate temporal information on irrigation results in modeled evapotranspiration closer to the spatiotemporal pattern of evapotranspiration deduced from remote sensing. Another conclusion is that irrigation modeling should consider the sub-grid heterogeneity to improve the estimation of soil water deficit and irrigation requirement.</p>

Irrigation of groundnut (Arachis hypogaea) grown in a Mediterranean environment

1993 ◽  
Vol 121 (3) ◽  
pp. 343-346 ◽  
Author(s):  
C. Metochis
Keyword(s):  
Growing Season ◽  
Soil Water Deficit ◽  
Water Application ◽  
Mediterranean Environment ◽  
Irrigation Requirement ◽  
Crop Establishment ◽  
South West ◽  
Crop Development ◽  
Daily Evapotranspiration ◽  
Moisture Conditions

SUMMARYThe response of groundnut to different amounts of irrigation water and the effect of irrigation on the occurrence of chlorosis during the establishment period of the crop were studied in south-west Cyprus in 1984–88. The irrigation requirement of groundnut for the entire growing season was found to be 480 mm. Under-irrigation resulted in a soil water deficit and reduced production. Application of water in excess of requirement also reduced yield. Daily evapotranspiration under optimum soil moisture conditions increased from 1·5–2·0 mm at the beginning of the growing season to 7·0–7·5 mm at full crop development; it then decreased to 2·0–3·0 mm by the end of the season. In soils of low CaCO3 content, neither frequent water application nor over-irrigation during the crop establishment period caused any chlorotic symptoms or affected yield.

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