A Comprehensive Groundwater Sustainable Management System establishment , water extraction management and ground water modeling

Source: World Bank — Second Ethiopia Urban Water Supply and Sanitation Project

REQUEST FOR EXPRESSIONS OF INTEREST

(CONSULTING SERVICES – FIRMS SELECTION)

Country: - FEDERAL DEMOCRATIC REPUBLIC OF ETHIOPIA

Second Urban Water Supply and Sanitation Project (P156433)

Credit No.:- IDA-60070

Assignment Title:   Study and Prepare “a Comprehensive Framework for Sustainable Groundwater Resources Development, Abstraction Management, and Groundwater Modeling System”.   

Consultancy Service Reference No: - ET-AAWSA-42137-CS-QCBS

The Federal Democratic Republic of Ethiopia (FDRE) has received financing from the World Bank toward the cost of the Second Urban Water Supply and Sanitation Project and intends to apply part of the proceeds for consulting service referenced above where target beneficiary is Addis Ababa city, capital city of FDRE.

The consulting service intended duration is for Twenty-four (24) calendar months.

Objective of the study:   is  to  meet exponentially growing water demand of Addis Ababa city by  developing groundwater resources after tackling the prevailing uncertainties resulted from   unexpected  groundwater  levels lowering, yield decline and quality and hazardous  substances  contamination risks   by establishing  comprehensive framework/system for  sustainable        groundwater development and abstraction/operations management. Ensuring sustainable, wise, economic, quality ensured and conserved use of groundwater without undesirable and unwanted effects to the environment.

The Study Area includes well fields located within Addis Ababa city administration borders and surrounding areas.  The  city population  is about 3.4  million,   currently about > 60 %  of   its  domestic and municipal  water supply source is  from groundwater , hundreds  of deep water wells drilled (reaching 500m of depth) in volcanic aquifers, largely scoraceous/scoria, vesicular  and  fractured (tectonic) basalts intercalated with acidic/intermediate   rocks ,   forming multilayer aquifers situated  on the western shoulder of the Ethiopian   Rift Valley.    

Scope of Consultancy Services: The scopes of services are mainly the following to be performed in chronological order.  

1. Situation Analysis: Assess the existing groundwater development and management system and related issues;      
2. Establish leading edge computer based groundwater Database and Database Management System: after performing entire inventory of all drilled wells, springs, in the study area and gathering   relevant data and information and  performing  analysis, and further  to be enriched by the findings of this study;      
3. Study and Establish Geological frameworks: : by producing geological maps at scale of 1:50,000, describing  lithostratigraphy, geomorphologic  features ,drainage  patterns, tectonic  structures along with  indicative  geostructural  maps  , cross sections, lineaments / fractures  networks etc.;
4. Study    and   categorize Hydrogeological  regimes and      conceptualization of the      groundwater  flow system of the study area producing hydrogeological maps at scale of 1:50,000, describing hydrology , hydrostratigraphy, geohydrochemistry , delineation  of   major and minor Aquifers etc.;
5. Study and Produce Groundwater Flow and Solute/Contaminant Transport Models at Regional, catchment /well fields levels which meets  the objectives of the study :     includes,  (a) producing models  conceptualizations  for  different scenarios of the groundwater flow systems, (b)    applying  best practiced  appropriate  modeling methods/types    to the study area to meet the study  objectives  (c) Selecting   and running   state of the art    softwares and codes   capable of    simulating  quantifying  and predicting current and future annually usable safe yield of potential   aquifers and  optimization/refinement at well field /catchment levels for sustainable abstraction/ operations management  and modeling   of  major  groundwater contaminants concentrations and paths ; and  assessing effects of  interactions of  groundwater  with surface waters (d) Produce Vulnerability map  of  major hazardous groundwater contaminants  and /or plumes  at scale of  1:50,000 ; 
6. Prepare Groundwater Atlas of Addis Ababa City (the study) area: comprising collection of maps (at 1: 50,000 scale) including graphs, charts, tables,   narrations etc., using GIS. Expected to display    maps of : delineation of major potential aquifers geometry and their predicted safe yields, geology,hydrogeology , geohydrochemistry, distribution  of  historic and  current water wells/ well fields  including  aquifer & well parameters ,  flow nets and groundwater levels, recharge and discharge zones, distribution of  major  hazardous  contaminants, water types,   salinity  maps,   delineation of  overstressed and  potential zones and so forth;  
7. Establish groundwater resources sustainable development and abstraction management system:  summing up the findings of the study    set groundwater (quantity and quality wise) abstraction goals, thresholds, and measuring   criteria   to safely  harness    potential aquifers at well field levels;  
8.  Design and establish groundwater monitoring networks  and  its management System;
9.  Recommend strategic prospects and risks of groundwater development and management   including future best practices, protection of aquifer depletion and pollution,     conservation measures etc. and the way forward.  

The Addis Ababa Water Supply and Sanitation Authority (AAWSA), Water and Sanitation Development and Rehabilitation Project Office now invites eligible consulting firms (“Consultants”) to indicate their interest in providing the Services. Interested Consultants should provide information demonstrating that they have the required qualifications and relevant experience to perform the Services. The short listing criteria are:-Core business and years in business, qualification, and experience in the field of assignment, organizational and managerial capabilities of the firm, and general qualification and number of key staff but not individual experts’ bio data. 

The attention of interested Consultants is drawn to paragraph 1.9 of the World Bank’s Guidelines: Selection and Employment of Consultants under IBRD Loans and IDA Credits by World Bank Borrowers dated January 2011 and revised July 2014 (“Consultant Guidelines”), setting forth the World Bank’s policy on conflict of interest for consulting services.

Consultants may associate with other firms in the form of a joint venture or a sub consultancy to enhance their qualifications.

A Consultant will be selected in accordance with the Quality and Cost Based Selection (QCBS) method as is set out in the Consultant Guidelines.

Further information can be obtained at the address below during office hours Monday-Friday 09:00 A.M-11:30AM in the Morning and 01:30 PM-05:00PM in the afternoon.

Expressions of interest must be delivered in a written form to the address below in person or by mail, or by fax, or by email on or before August 27/2018.

Addis Ababa Water and Sewerage Authority (AAWSA), Water and Sanitation Development and Rehabilitation Project Office

Attn:                Ephrem Wubeshet, Procurement Support Process, Head

P.O. Box:         1436/1110, Addis Ababa,

Street Address: - CMC road, on the way CMC about 400m from Megenagna Square, in front of Bole Sub-City Wereda 06 Administration

Tel:                  +251-116676920   

City: - Addis Ababa 

Country: - Ethiopia

E-mail address: -eph77@yahoo.com