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Irrigation Infrastructure Datasets

Barrages: A Barrage is a structure constructed across a river course to increase the water depth or divert the river flow for irrigation or navigation purposes. The ten barrages on the Shabelle and Juba Rivers are probably the most significant pieces of irrigation infrastructure in Somalia. They were constructed to increase the water depth in the river and divert the flow for irrigation purposes. The barrages were built of concrete with mechanical, metal gate structures, which can be opened during flood times. In Somalia, irrigation barrages were developed in the middle and lower parts of the two rivers from as early as the 1920s to irrigate land for commercial and food crops. Good topography permitted gravity irrigation through a network of canals. A total of nine barrages were built on the Shabelle River, and one on the Juba River.
This dataset shows locations of known barrages in Somalia. Point locations were originally digitized from scanned topographic maps and later verified using SWALIM aerial photos of 2008. Field verification has also been done on each location. Download data

Primary canals: within SWALIM’s irriation infrastructure, primary canals are defined as those canal that take water directly from the river and close to barrages. These canals are direcly affected by the barrages and empty their waters into the secondary canals. This dataset contains location of primary canals on Juba and Shabelle rivers in Somalia. Same as barrages, this is a product originally from the Somalia Topographical Maps and high resolution satellite imagery and aerial photos. Download data

Direct intake canals: within SWALIM’s irriation infrastructure, direct intake canals are defined as those canals that take water directly from the river but away from barrages and are not directly affected by the barrages. These can be locations where pumps are used or river banks are dug to channel water directly to canals for irrigation purposes. They also empty their waters into secondary canals. Same as barrages, this is a product originally from the Somalia Topographical Maps and high resolution satellite imagery and aerial photos. Download data

Secondary canals: secondary canals are defined as those canal that take water directly from the other primary canals (Primary and Direct intake canals). These canals empty their waters to the tertiary canals. Same as barrages, this is a product originally from the Somalia Topographical Maps and high resolution satellite imagery and aerial photos. Download data

Bridges: These are locations of known bridges within the irrigation schemes areas of Southern Somalia. This is also a product of both Somalia Topographical Maps and high resolution aerial photographs of January 2008. Download data

Culverts: These are locations of known culverts within the irrigation scheme’s areas of Southern Somalia. This is also a product of both Somalia Topographical Maps and high resolution aerial photographs of January 2008. Download data

Irrigation Schemes: Irrigated agricultural development started in 1920 with the implementation of the Jowhar Sugar Estate. The scale of irrigation development increased rapidly thereafter and by 1980 some 60 000 hectares had been developed in Jowhar and Balcad Districts, located in Middle and Lower Shabelle Regions respectively (Mott McDonald and Partners, 1969). Between 1980 and 1990, irrigated areas benefited from a well-established network of canals and drains, allowing a consistent supply of water that was supplemental to the scarce and unreliable rains, with abundant surface and underground waters from the Shabelle and Juba Rivers. For many years, the fertile soils and climate had sustained good performance of both cash and food crops under irrigated conditions, while extra water was used for leaching practices that kept salinity build-up under control. Download data

Canal Database - GENEYSIS 2008: This dataset contains coverage of both primary and secondary  canals .A total of over 7500km of canals were digitized from the 2008 aerial photography of spatial resolution 0.25 meters and a more detailed dataset was generated. Download data

 
The data on SDDR is shared for free to all organisations and individuals working in related fields in Somalia
When data from SDDR is used in reports or other publications, the source must be cited as FAO SWALIM
The boundaries and names in the maps do not imply an official endorsement by the Food and Agriculture Organisation

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