|
Tenders are invited for Hydrogeological and Geophysical Survey for Borehole Sitting Location: Buulo Haaway, Irinti Yarey, Qurunlow Asharafed, Goofgalool, Buulo Roobow Baidoa District, Bay Region Reference: GREDO Ground Water Consultancy Area of Interest: Hydrogeological, geophysical survey for borehole sitting Location: Buulo Haaway, Irinti Yarey, Qurunlow Asharafed, Goofgalool, Buulo Roobow Baidoa District, Bay Region. Position Type: Consultant/Firm Duration: 06 days for Re-advertisement Start Date: 06th October 2025 Closing Date: 11st October 2025 Submission Email: consultants@gredosom.org Or Sealed bid documents to GREDO Baidoa and Mogadishu offices in a sealed envelope clearly stating the company name and its contact address not later than 3:00 PM on Friday 10 October- 2025. Scope Of the Work The Consultant is expected to use both secondary and primary data in the exercise. Secondary data will involve desk study of available information/data on existing boreholes, drill logs, reports, and maps while primary data will be obtained by carrying out field reconnaissance and measurements of existing boreholes and geophysical prospecting within the studied area using a combination of geophysical methods as below described..: The outcome of the consultancy will be a detailed hydrogeological survey report giving details of the findings and recommendations. Responsibilities of consultant. · To conduct water resource mapping while also conducting the hydrogeological and geophysical investigation for the optimal sitting of a drinking water borehole in Bay region (Baidoa district) by assessing Five Villages or sites namely, Buulo Haaway, Irinti Yarey, Qurunlow Asharafed, Goofgalool, Buulo Roobow in Baidoa rural. These target locations are aimed at determining suitability for mechanical drilling of boreholes, Survey Approaches Required The hydrogeological/geophysical investigations will be carried out in a multistep approach: 1. Desk study: Review of existing data, topographical maps, satellite images, existing studies and Borehole site investigations in the area, geological reports and maps (if available), borehole and surface water records, etc. 2. Hydrogeological fieldwork: Detailed reconnaissance survey of project area. (GPS coordinates/P codes, water level measurements, condition of these boreholes, usage and performance, estimation of the hydraulic characteristics from existing well test and aquifer test), vertical geophysical prospecting at known boreholes for calibration purpose: measurement of the real resistivities of geological formations based on the existing borehole logs. 3. Preparing hydro-geological maps which include location of existing boreholes and their water quality. 4. Geophysical measurements vertical and horizontal electric sounding, vertical electric 3D tomography, EM method and possibly seismic refraction method are recommended for this assignment. 5. Analysis and interpretation of field data for selection of potential sites for drilling 6. Presentation of the results to hydrogeologist/geologist experts from GREDO and Southwest Ministry of Energy, Water, and Resources (MoEWR) for validation of the best possible site 7. Field validation of the site to ensure there is no obstacle for drilling (explanation and agreement with the community, no land tenure or future urban planning issues, access to drilling machine, risk of contamination, ) Reporting The final report will be submitted to GREDO after signed off and approval from the Ministry of Energy, Water, and Resources (MoEWR of southwest, Somalia. the report will be a comprehensive account of the whole of the Consultancy; it will review the existing literature and other relevant information, such as drilling logs, satellite images, etc. The report shall include all field data, interpretations and justifications, hydrogeological evaluations, conclusions and recommendations relating to the investigated areas. In addition, appropriate maps, diagrams and data plots shall be presented. Of considerable importance will be an objective assessment of the applicability and success of the methods applied. The outline table of contents of the final report will be as follows: · Introduction, review of previous studies and environmental background hydrogeological information of the studied area, including history of groundwater depletion or known changes in quality : mineral content including unharmful iron- and harmful -fluorides, nitrates-; and toxic elements such as arsenic ; bacteriological pathogens. · Geology and hydrogeology (incl. Inventory of positive and negative boreholes, aquifer characteristics storage and hydraulic- and well characteristics sustainable discharge rate- based on available data., and water quality) · Methods of investigations, including Geophysical Techniques · Calibration of the geophysical instrument at known boreholes (yield, log) for the geophysic characterization of the geological formations, including the aquifer(s). · Methods of investigations, including combination of geophysical methods. · Geophysical prospecting on different sites. · Detailed resistivity survey (Wenner & VES) and seismic refraction to delineate the productive aquifer · Aquifer potential; sustainable yield & Water quality · Interpretation and comparison of studied sites: aquifer and borehole potentials, Most suitable drilling site and justification , target aquifer(s) for drinking water production, mentioning assumptions, risks and risk management. · proposed drilling method, with equipment characteristics (incl. estimation of the casing and screen positions) · Simplified Environmental and societal impact of the drilling and required risks reduction measures · Conclusion and recommendations Expected Deliverables The consultant/firm is expected to deliver: · An inception report presenting 1/ the steps and methodology for the assignment against the present Terms of Reference and justifying any difference or discard with the TOR. · The implementation plan and requirements for the site investigation. A brief note with the recommended sites selected for borehole reconnaissance and geophysical survey, for GREDOs validation before the field deployment, · The presentation of the field work, interpretations and conclusions to the GREDO and the water authorities. · The final technical report Work Plan ACTIVITY DESCRIPTIONTime Line-September 2025W1W2W3W4Secondary data collection, review of field documents on existing boreholes and studies, and analysis Key informant interviews (face to face or remote) Field work: Reconnaissance of existing boreholes, geophysical prospecting and final validation of the selected site Presentation to GREDO and authorities, Reporting GREDO responsibilities. To ensure the assignment is smoothly and successfully implemented GREDO will provide all necessary support including coordination with stakeholders, logistics including during field surveys, local government engagement and other relevant actors, GREDO staff participation and meeting rooms, accommodations at GREDO Baidoa guest house and support in community engagement. Remuneration and payment. Based on the financial proposal, the consultant fee will be negotiated and agreed before formal contract and payments will be based on successful completion of agreed deliverables. Pls note to quote all expenses inclusive e.g. travel cost, accommodation, periderms and other costs during this exercise. The consultant/firm will be responsible for their own security; insurance while in the field and GREDO will not be responsible for any injuries or damages incurred during the assignment. The costs submitted must be inclusive of all anticipated expenses. GREDO will select the geophysical surveyor based on their technical competence and experience. Mandatory Security Training The consultant shall be expected to go through mandatory on-line security training and submit the certificate of completion to GREDO before the commencement of the task. Failure to deliver this will lead to an automatic disqualification. GREDO will advise on the security plan on appointment. Child Protection/Safeguarding: GREDO holds zero tolerance for safeguarding misconducts and the agro dealer is responsible to raise awareness of GREDOs child protection and safeguarding policy and to protect children from all forms of abuse, exploitation, harassment, violence and discrimination and report any incident in relation to CP/safeguarding. GREDO is committed to safeguarding the rights of its program beneficiaries, children, girls and women and all GREDO staffs/consultants and contractors have the primary responsibility in protecting those most vulnerable and at risk. Core Values: · Integrity · Commitment · Respect, · Voluntarism · Neutrality Requirement (Qualification, Skills and Experience). GREDO seeks to invite qualified consultants/firms who meet the following requirements to submit their detailed narrative and financial proposal on how to undertake the assignment. 1. Technical proposal on how the assignment will be conducted including methodologies, data analyses and interpretation, reports and schedules. ( List software to be used for analysis) ( 30%) 2. Proven field technical and field experience of Consultant with Masters degree in geology, hydrology, engineering geology, physical, or earth science, or in any related field and having good experience of working in this sector. (10%) 3. Consultancies performed in the last 10 years especially with reference letters for each hydrogeological surveys consultancy (15%) 4. Proof of availability of all the equipment, personnel and ability to mobilize them on short notice (Include list of equipment, Brand/Manufacturer, CVs of the personnel) to perform the survey. (15%) 5. Submit a detailed financial proposal including all professional fees, report costs and subsistence costs. Please no Tender Link : https://somalijobs.com/tenders
|
