Irrigation systems / Irrigation canals / Water supply / Watercourses / Water allocation / Irrigation scheduling / Hydraulics / Models / Seepage loss / Flumes / Calibrations / Discharges / Performance indexes / Pakistan / Indus River

Barral, J.

English

Research Papers in Economics

2.1, the salient characteristics of the Fordwah Distributary are presented (Kuper and Kijne

6100 Maps of these watercourses, along with a more comprehensive set of data for each watercourse, and the result of the calibration work of each watercourse, are given in Annex 3.

Advance Phase The advance phase measurements made on FD14 are studied in the following section, using graphics of speed with respect to distance as Renault

b asset et al

BY THE SYSTEM Yields of the main crops in Pakistan are among the lowest in the world (World Bank

compares the advance phase of this model with the full hydrodynamic model; he shows that the difference between these two models are negligible. However, the computation time of the Zero-Inertia Model is much shorter. Walker el at.

Different methods have been used for this purpose : Katopodes and Slrelkoff

Following the study of Trout

Froude similitude: Comparison between a furrow and a watercourse.' 960 rn ('L) I 330 m 71 l/s (*L25) 70 11s 0.0006 0.0001 to 0.001 1 I3 1 I25 ' The example of furrow infiltration is taken from Maillol

Given a step Function at the outlet, the lagtime until it reaches the farmer at the tail is: 6T= length -- -

LOSSES AT THE WATERCOURSE LEVEL In order to have a first assessment of the seepage in the different channels, we will refer to the extensive survey carried out by Ali et at.

Of the total cultivable area of 21

The main causes of this poor performance are: The funds allocated to the Operation and Maintenance (O&M) are inadequate (World Bank

The results of these regressions are not as good as in the Trout

The same restrictions as for the Kinematic-Wave Model apply for the application of the VolumeBalance Model, In addition. some inaccuracy is added in the assumption that the shape factor is constant. A comparison survey (Holzapfel el at.

The total area of Pakistan is 79.6 million hectares (Mha). In 1988-89, the total cultivable area was 21 Mha (26 percent of the total area), of which 16.2 Mha (77 percent of the cultivable area) were irrigated.

Development of a watercourse-based model to assess the canal water supply at the farm level

http://publications.iwmi.org/pdf/H019739.pdf

Development of a watercourse-based model to assess the canal water supply at the farm level

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Research Papers in Economics