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Mogambo Irrigation Project, Supplementary Feasibility Annex 1: Hydrology

The Mogambo project is situated in the Lower Juba basin. The climate is semi-arid and annual average rainfall is only about SO0 mm per year. Almost all crop water requirements are met from the Juba river. Chapter 3 summarizes crop water requirements for the Mogambo project and other developments planned for the next 10 years and gives incremental water usages expected in the immediate, short and medium terms. An analysis of river flows expected in each month at various locations is reported in Chapter 4. These water availability are compared with incremental future water uses, which take account of all medium-term development on the Juba, to give the net availabilities at Mogambo. Drainage rates from cropped areas are discussed in Chapter 5, using daily water balances and allowing for rainfall, infiltration and evaporation.

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Sir M MacDonald and Partners Limited

Mogambo Irrigation Project, Supplementary Feasibility Annex 2 Soils

This volume gives results of a semi-detailed soil survey carried out over a total gross area of 9,559 ha of the Mogambo irrigation project area. The report aims to extend the results of earlier studies on soils in the area . This is achieved by a more detailed observation network of survey sites in the area in particular within the Juba alluvial sails (five sites/km2). It also provides more quantitative data on the soil chemical and physical properties as an additional aid in soil classification for planning the development of irrigation in the area. Soil units identified are described in terms of modal characteristics and the variation found within the unit with profile descriptions for a11 pits and selected auger holes included in Appendices II and III. The nature of the mapped boundaries is fully described. The land was classified making use of the United States Bureau of Reclamation (USBR) methods, modified to suit the conditions found in the area. Suitability for rice and for field crops other than rice were considered separately and special use Class 4 was used to indicate areas more suitable for sprinkler development. Limitations affecting land suitability are denoted by the use of suitable land class suffix letters.

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Sir M MacDonald and Partners Limited

Mogambo Irrigation Project, Supplementary Feasibility Study Annex 3 - Agriculture

(Extract from the introduction) The agricultural planning for a State-owned large scale farm which will utilise effectively the physical and human resources of the Mogambo project area is discussed in this annex. The soils, population and labour force in the area are discussed fully in Annexes 2 and 6 respectively. The main conclusions regarding suitability of the land for irrigated cropping and availability of labour are mentioned here as they are primary factors determining the cropping and farming systems proposed.

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Sir M MacDonald and Partners Limited

Mogambo Irrigation Project, Supplementary Feasibility Study Main Report

The principal tasks included in the terms of reference for the supplementary study are summarised below: ol; liUndertake a topographical survey of the whole project area and beyond its boundary, by up to 500 m where necessary. /li; liCarry out a semi-detailed soil survey of the project area including comprehensive in situ and laboratory analyses of soil and water samples./li; li Review the hydrology of the Juba river with particular regard to' the low flow periods and project flooding and the influence of Bardheere dam on the project. /li; liCarry out a preliminary design of the irrigation and drainage system including layout drawings, canal and drain longitudinal and cross-sections, flood protection details, pump station design, typical structure drawings and preliminary details of project infrastructure./li; /ol

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Sir M MacDonald and Partners Limited

Mogambo Irrigation Project, Supplementary Feasibility Study Annex 4 - Livestock

(Extracts from introduction)The objective of this study was to evaluate the technical and economic feasibility of developing a livestock enterprise within the Mogambo irrigation project. Any livestock enterprise would need to fit into the overall strategy of a state farm, but, of necessity, must also relate to the present and proposed developments of the livestock and agricultural sections in the Lower Juba region. The removal of fodder crops from the cropping pattern at Mogambo has meant that emphasis has now to be placed on crop residues and by-products as the principal source of feed.

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Sir M MacDonald and Partners Limited

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Sir M MacDonald and Partners Limited

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Watson R. M.

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Resource Management and Research

Mogambo Irrigation Project, Additional study for and alternative development

The terms of reference for this Additional Study called for two alternatives (A and B) to be investigated. The development for alternative A has been based on the proposals of the Supplementary Study and allows for future expansion to the full area. The development for alternative B has been chosen as the beat area to be implemented independently of any future expansion. Alternative A identifies 2 052 ha net of surface irrigation and 163 ha net of overhead irrigation, and alternative B Identifies 1,809 ha net of surface irrigation end 122 ha net of overhead irrigation.

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Sir. M MacDonald and Partners Limited

Present and future irrigated agriculture in the Shabelle and Juba rivers

In this report, written after a visit to Somalia to evaluate irrigation potential, the hydrometric data base is questioned as regards both its validity and its representativity. Steps to improve the basic data are proposed which include technical assistance to check and re-establish station ratings over a period of one year. The design plan of the juba high dam is discussed and attention drawn to the necessity of seeking the best professional advice to determine this parameter which has a direct bearing upon the safety and the cost of the dam. Present and proposed irrigation in the Shebelle and Juba valleys are examined.

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Henry, J.,C.

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Food and Agriculture Organization of the United Nations, Rome (Italy), Somali Democratic Republic

Somalia Comprehensive Groundwater Project; Project paper

The goal of the project is to strengthen the capability of the water Development Agency of the Government of Somalia to design and implement a national water resource development program. The Project will assist in the collection of adequate national hydrogeologic, economic and social data and will provide technical assistance and commodities for a production drilling program. Data collected under the will enable the National Water Cormnittee (NWC) to establish priorities for a rational approach to national water resource development

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Unites State Agency for International Development

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