Water Supply
Sanitation and Hydrology of Civil Infrastructures
River Basins,
Water Resources Engineering & Environmental Studies

River basins, Water resources engineering and Environmental studies have been and will remain to be the core fields of operations for the WEMA team of experts. Since the inauguration of the company, several projects in these fields have been successfully completed. Below are some of the ongoing and completed projects in this category.


Client, location


Consultancy Services for Carrying out Environmental Audit for Six (6) Existing Dams in Arusha and Tabora regions.

The overall objective was to carry out a detailed environmental audit for six dams in two lots to identify the specific environmental aspects that should be addressed during the rehabilitation of those dams. The secondary objective was to assist the Ministry of Water in identifying and developing a strategy for mitigation of current and expected environmental and social impacts from the planned rehabilitation activities. The environmental audit was conducted in accordance with requirements of the 2004 Environmental Management Act. The approach and methodology ensure that the key potential risks associated with the rehabilitation activities are addressed or minimized to ensure that the consultant outputs are suiting the purpose.

Ministry of Water, Tanzania

November 2012-May 2013

Development of a Pilot Catchment Management Plan in the Kyoga-WMZ. 

WEMA Professionals were responsible for preparation of Inception Report, Catchment situation analysis and water resource assessment, Stakeholder identification, analysis and consultation, Strategic Social and Environmental Assessment, Analysis of future water demand and development issues and problems, Evaluate options for water resource development & management and formulate alternative plans and Develop the catchment management plan and assess institutional and policy framework for plan implementation. In addition WEMA professional were responsible for GIS matters including development of Planning ATLAS.

The World Bank Group, Uganda

November 2012-May 2013

Development of a Basin Wide IWRM Based Development Plan for the Kagera Basin (Tanzania, Rwanda, Burundi, Uganda)

The purpose of the Kagera Basin Development Plan (BDP) was to identify, categorise and prioritise projects and programmes at the basin level. Using the principles of Integrated Water Resources Management (IWRM), the BDP process is intended to promote the coordinated development and management of water and related resources in order to maximise economic and social welfare without compromising the sustainability of the water resources in the basin. The Consultant undertook the following in order to achieve the stated objective: Diagnostic Assessment of the Kagera Basin (to establish a baseline for the basin and outline the development concerns and opportunities) and Formulation of Basin-wide Strategic Options, Priorities and Action Plan. In addition WEMA professional were responsible for GIS matters including development of Planning ATLAS for the entire river basin.

The Nile Basin Initiative (NBI)/Nile Equatorial Lakes Subsidiary Action Programme (NELSAP), Rwanda

April -November 2012

Harmonization of regional policies, rules and regulations governing utilization of water resources in the Lake Victoria Basin (Tanzania, Rwanda, Kenya, Burundi, and Uganda)

WEMA Professionals were responsible for preparation of harmonised policies, legislation, regulations and institutional arrangements governing the management of transboundary water resources, and an action plan for implementing the proposed policies, legislations and regulations.

Lake Victoria Basin Commission, Kisumu, Kenya

March 2011 - March 2012

Groundwater Assessment of the Pangani River Basin.

WEMA Professionals were responsible to

  1. Undertake a comprehensive groundwater assessment which includes:
  • Compile and analyse existing data and information on groundwater in the Pangani Basin
  • Identifying gaps in groundwater information and produce a plan to ensure completion of groundwater assessment
  • Develop Pangani Basin Hydrogelogical Map and a detailed report on quantity, quality and pollution conditions, with the necessary GIS-based data and information for planning, development and management of the groundwater in the basin
  • Develop Groundwater models for respective aquifer systems and well fields
  • Develop a robust groundwater database
  1. Provide recommendations on the protection measures of the aquifers; Groundwater management scenarios; Safe yield of groundwater in different sections of the basin; Environmental and other non-economic benefits from groundwater; and Consideration of climate change in the management of the groundwater resources
  2. Develop a groundwater management framework which provides guidance for integration into IWRM planning process

IUCN, East and Southern African Region (ESARO), Tanzania

August 2010-July 2011

Preparation of an Integrated Management Plan (IMP) for Kilombero Valley Flood Plain Ramsar Site, Tanzania. Participatory approach was adopted in undertaking the preparation of IMP. The key tasks involved were:

  • Preparation of a management strategy for the KVRS
  • Preparation of a 5 years IMP for the KVRS; and
  • Facilitating the integration and mainstreaming of the IMP into the District Development Plans (DDPs) of the Kilombero and Ulanga District Councils.

Ministry of Natural Resources and Tourism and Belgian Technical Cooperation (BTC), Tanzania

July-Sept 2010

Strategic Environmental Assessment (SEA) for Tanzania Agricultural Input Partnership.

The assessment covered the whole country (Tanzania). Specifically the consultant review and assess the possible environmental implications of Tanzania Agriculture Partnership (TAP) activity as described in the National Rollout Framework, available Annual Work Plans and Budgets, and specific Value Chain Support and District-level activity plans. This was complemented by discussion with TAP Unit Staff in the Agricultural Council of Tanzania and key TAP partners and participants at national and local levels.

Tanzania Agriculture Partnership (TAP)/ Agriculture Council of Tanzania (ACT), Tanzania

February- March 2010

Community based participatory water feasibility study for three dam sites, 10 deep boreholes sites and 18 shallow well sites.

The survey was a participatory and included two types of water surveys; Ground water survey and Surface water survey by identification of suitable locations for borehole drilling and charco dams. Specifically the survey activities were to:

  • Organize and conduct a participatory ground water survey between community members, AMREF staff and the consultant team in Serengeti district in five wards namely Nata, Rung’wani, Kebanchabanca, Kyambahi and Issenye.
  • Provide feedback, especially the results to AMREF staff and district Council, and the key officials responsible for development projects in Serengeti district.
  • Provide a comprehensive report that gives alternative sites for water sources (drilling of deep wells) with a wider opportunity of getting enough yields to sustain the demand of the respective communities. The report included:
    • Potential sites for Boreholes  (10 sites)
    • Potential sites for Charco dams construction (three sites)
    • Sources for ring/shallow wells (18 sites)

AMREF, Tanzania

September 2008

Provision of Hydrological and GIS expertise in the Three Hydro dams (Mograt, Dagash and Sabaloka) in Sudan for Environmental and Social Impact Assessment for the Dam Implementation Unit of Sudan.

WEMA Professionals were involved to:

  • Assist with scoping of the potential environmental impacts of the project
  • Collect/review hydrological baseline data for the area of project impact
  • Provide hydrological expertise for the in stream flow requirements of the Nile river
  • Assess the hydrological impacts from the project and identify mitigation measures to reduce/eliminate any adverse impacts for inclusion in the EMP
  • Identify any opportunities with the project to enhance the environment
  • Handle all matters related to GIS information such as preparation of full supply level of the dams
  • Undertake field investigations and literature reviews as necessary
  • Prepare written input on the subject/activities above for inclusion in the ESIA final report

Dam Implementation Unit, Sudan


Nov 2008 – May 2009

Study on Management Challenges in the Lake Victoria Basin: Issues and Options (Tanzania, Kenya, Uganda).

The evaluation covered the followings:

  • Identify key stakeholders in the management of water resources in the Lake Victoria Basin. 
  • ascertain the contribution that the lake makes to the economies of the riparian countries
  • ascertain the contribution that the lake makes to the livelihoods of communities living in its vicinity
  • ascertain the current policies and institutional arrangements for management of Lake Victoria in each of the riparian countries and evaluate the extent to which they have similar or conflicting interests (e.g. hydropower production vs other water resource requirements)
  • evaluate possible causes for reduced water levels in the lake in recent years and determine and the possible role of climate, hydropower and upstream development in Burundi, Uganda, Rwanda,Tanzania, and Kenya

International Water Management Institute (IWMI), Sir Lanka

September 2008-February 2009

Environmental and Social Impact Assessment for Bisarwi Dam and its associated small scale irrigation scheme for the Nile Basin Initiative, Nile Equatorial Lakes Subsidiary Action Program, Mara River Basin Transboundary Integrated Water Resources Management and Development Project.

The key activities in which WEMA Professionals were involved are: Collecting and analysing hydrological and water resources data  in the study area; Analyse all environmental impacts related to irrigation schemes in the study area; Undertake environmental audits related to the dam; Collect all GPS points for the entire dam catchment; Analyse all GPS points using GIS software to obtained base information for hydrological and environmental analysis; Perform runoff yield analysis for the entire catchment; Undertake sedimentation analysis of the proposed dam to obtain base data for the estimation of the life time of the dam as one of the negative environment impact to the people of Bisarwi; Undertake consultative meetings with local communities in the study area; and Preparation of Technical report.

Nile Basin Initiative, Mara River Basin Transboundary Integrated Water Resources Management and Development Project, Tanzania

March - August 2007

Metolong Dam Environmental and Social Impact Assessment.

The Metolong Dam was designed to supply domestic water for the Maseru City (Lesotho Capital) and South Africa. WEMA professionals were involved in the water demand review for the city, hydrological analysis of the river and its In-stream Flow Requirement. Also provision of irrigation demand and mapping of the resettlement using, survey, Image and GIS software.

Department of Water Affairs, Lowlands Water Supply Units, Lesotho, South Africa

2005 – 2006

Environmental Impact Assessment and hydrological analysis of the Sangasanga – Mzumbe proposed road project for Tanzania National Roads Agency, Morogoro.

WEMA Professionals were Responsible for; Analysis of all hydrological and hydraulic of the proposed road. Perform both social and environmental impact assessment with a major attention to the Mindu dam the major water sources for Morogoro town; Using topographical map and GIS software to Identify the catchment area responsible for runoff across the road and analyse sedimentation effect to both the Mindu dam and to the crossing structure.

Tanzania National Roads Agency (TANROAD), Tanzania

March 2005 - Sept 2005

Detailed Design Environmental Impact Assessment and Supervision of Kungu Beach Protection work.

WEMA consult working as a Sub Consultant for the design and supervision of the Kungu beach Plots was involved in the followings:

  • Data collection on wind speed, water level, high and low tides etc at the plot site
  • Perform experiment on wave energy using different size of boulders at the site at different tide levels
  • Design accordingly the protection groynes at the plot site
  • Develop drawings and quantities (Tender documents)
  • Survey and analyse volumes required to fill the eroded soils/soil loss
  • Supervise the construction

Kungu Beach Limited, Tanzania


August 2004-December 2005


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