Application of the Head-Tail Method to Determine Irrigation Coefficient in Hongguang Irrigation District

Irrigation coefficient is not only a critical criterion of the efficiency of agricultural water use, but also an important basis for the evaluation of regional water-saving scheme. According to the Head-tail method (measured net irrigation water use and gross irrigation water use), the irrigation coefficient of Hongguang irrigation district was determined in this paper. The results showed that this method well fitted the real situation of Hongguang irrigation district, and had several advantages including conceptually clear, convenient to use by local staffs. Practical application of this method in irrigation district provides good reference for the future routine evaluation of irrigation efficiency in irrigation.

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Water use efficiency in four irrigation regimes in bulb onion production in the Alto Chicamocha Irrigation District

Revista Colombiana de Ciencias Hortícolas ◽

10.17584/rcch.2020v14i3.12347 ◽

2020 ◽

Vol 14 (3) ◽

pp. 393-401

Author(s):

Germán Eduardo Cely-Reyes ◽

Karen Victoria Suárez-Parra ◽

Rosalina González-Forero

Keyword(s):

Soil Moisture ◽

Water Use Efficiency ◽

Water Use ◽

Irrigation Water ◽

Irrigation District ◽

Irrigation Regime ◽

Irrigation Regimes ◽

Bulb Onion ◽

Irrigation Water Use ◽

Use Efficiency

The bulb onion is one of the most important agricultural products in Colombia. The productive conditions of the Riego del Alto Chicamocha (Boyaca) district are a regional and national benchmark for this market. The objective of this research was to evaluate four irrigation regimes in terms of production and irrigation water efficiency in bulb onion crops. This trial was in the municipality of Nobsa, village of Dicho (Boyaca). A completely randomized design with four treatments was used: irrigation regime with 150% evapotranspiration (Evt); moisture-based irrigation regime, detected with soil moisture sensors; irrigation regime with 100% Evt; irrigation regime with 60% Evt, along with four repetitions. Starting three weeks after transplant and for 11 weeks (77 days), the polar diameter (cm), equatorial diameter (cm), root length (cm), leaf length (cm), SPAD units, stomatal conductance and irrigation water use efficiency were determined. The irrigation regime with 100% Evt had the best performance in terms of the polar and equatorial diameters and the root and leaf lengths, which were reflected in the fresh weight at harvest. The irrigation regime with soil moisture values obtained from remote sensors, with lower amounts of applied water, had better values for the transformation of water to fresh mass, with 13.64 kg mm-1.

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Irrigation Water Use Efficiency Based on the Deficit Irrigation Theories

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.864-867.2179 ◽

2013 ◽

Vol 864-867 ◽

pp. 2179-2184

Author(s):

Hong Wei Jia ◽

Lei Lei Zheng

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Irrigation Water ◽

Deficit Irrigation ◽

Irrigation Water Use Efficiency ◽

Practical Applications ◽

Agricultural Water Use ◽

Irrigation Water Use ◽

Scale Characteristics ◽

Use Efficiency

Irrigation water use efficiency is an important index to evaluate agricultural water use efficiency of irrigation districts, and is a basic parameter of hydraulic engineering construction and water management. However, there are many problems in practical applications of the traditional irrigation water use efficiency which is based on sufficient irrigation theory. This paper puts forward a new concept and determination method of irrigation water use efficiency based on the theories of deficit irrigation. Finally, we discussed the connotations from the project characteristics, benefit characteristics, spatial scale and time scale characteristics.

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