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Accueil du site → Master → Pays Bas → 2009 → Performance assessment of water distribution system in large scale irrigation systems : a case study of Chokwe irrigation system in Mozambique

UNESCO-IHE Institute for Water Education, Delft (2009)

Performance assessment of water distribution system in large scale irrigation systems : a case study of Chokwe irrigation system in Mozambique

Julaia, C.d.S.

Titre : Performance assessment of water distribution system in large scale irrigation systems : a case study of Chokwe irrigation system in Mozambique

Auteur : Julaia, C.d.S.

Université de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2009

Résumé partiel
In the agriculture-based countries, which include most of Sub-Saharan Africa, agricultureand its associated industries are essential to growth and to reducing mass poverty and foodinsecurity. Mozambique, where this research was carried out, is one of the agriculturebasedcountries and this activity provides food security and is an important source ofincome for 75% of the 20 million inhabitants in the country.Agriculture is by far the largest user of water, contributing to water scarcity. Concernsabout scarcity of water have focused attention on irrigation, the largest water-using sectorworldwide. Improvement of the efficiency and distribution uniformity of irrigatedagriculture can minimize the gap between potential crop water requirements and actualwater use. This research was carried out on performance assessment of water distribution in ChokweIrrigation System in order to check the state of health of the system and also the level ofwater use. The main objective of the study was to analyse the efficiency of the currentwater distribution, operation rules on the system, simulate the water flow with a hydraulicmodel (DUFLOW) and recom mend possible solutions for improvement on the water useefficiency.In order to achieve the objectives different tools as CROPWAT and DUFLOW model wereused. Data on cropping pattern, crop yield, canal cross sections and hydraulic structuresparameters, delivered discharge were collected in the Chokwe Irrigation System to do aproper analysis. The simulations to improve the current situation were selected based ontwo approaches : increasing the cultivated area and suggesting different options to operatehydraulic structures. For the first approach performance indicators were computed using thecurrent discharge delivered in case of an increment by doubling the cultivated area in eachsecondary canal.

Sujets  : performance assessment water distribution systems irrigation schemes hydrological modelling case studies Mozambique

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Page publiée le 3 avril 2021