This annex examines the economic and agricultural background in Somalia, and discusses the marketing mechanisms and financial and economic crop prices. Economic models for the project are constructed and analyzed, and the recommended model is discussed in detail

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.

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.

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.

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

The principal objective of the Soil and land classification studies was to evaluate the potential of land for irrigated agriculture. This essential information was required for the associated master planning and feasibility studies of the Janaale-Bulo Mareerta study

(Extract from the introduction) The terms of reference for the Master Plan contained the following major headings:br Soil survey with special emphasis on salinity problemsbr Topographic survey to prepare maps at a scale of 1: 25 000 using aerial photographybr Agricultural development mappingbr Survey of existing water use and the irrigation systembr Study of hydrology and the need for flood protectionbr Survey of existing hydro geological databr Demographic, economic and social studies.br; br Much of the work on-the assignment is common to both the Master Plan and the feasibility study and for this reason it was decided to use common annexes for both reports. br Volume 1 Master Plan - Main Report brings together all matters relevant to the 70 000 ha Study Area and Volume 2. Feasibility Study - Main Report, similarly covers the selected 5 000 ha Project Area.br; br SUMMARY OF REPORT TITLESbr Master Plan Reportbr Feasibility Study Reportbr Annex I Soilsbr Annex II Water Resourcesbr Annex LII Human Resources and Institutionsbr Annex IV Existing Agriculturebr Annex V Livestockbr Annex VI Potential Agricultural Developmentbr Annex VII Engineeringbr Annex VIII Economic and Financial Analysisbr Annex IX Management and Implementationbr Annex X Survey Databr Annex XI Inception Reportbr