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DAM AND IRRIGATION SITES FINAL DESIGN OF 4 SITES FOR LAND HUSBANDRY WATER HARVESTING AND HILLSIDES IRRIGATION (LWH) PROJECT (RWANDA)

DAM AND IRRIGATION SITES FINAL DESIGN OF 4 SITES FOR LAND HUSBANDRY WATER HARVESTING AND HILLSIDES IRRIGATION (LWH) PROJECT (RWANDA)

The main project's component was the detail feasibility study of the dams and supplemental irrigation infrastructure necessary for hillside irrigation at four sites (Nyanza-23 Karongi-12, Karongi-13 and Gatsibo-8). For each dam and irrigation sites, the study included review of existing designs and studies, field visits and geotechnical investigations, detailed design of dams and irrigation networks, preparation of tender documents, design workshops with the Service and the Panel of Experts and dam safety calculations

 The four (4) schemes had the following characteristics:

  • The Nyanza 23 scheme the study concerned a total area of 450ha corresponding to an annual irrigation water demand of 1.3 million cubic meters and included the design of a clay core earth fill dam of 19m height with a total embankment volume of 77,500m3, the reservoir capacity was 1.82 MM3.
  • The Karongi-12 scheme the study concerned a total area of 255ha corresponding to an annual irrigation water demand of 0.65 million cubic meters and included the design of a clay core homogenous dam of 22.5m height with a total embankment volume of 118,850m3, the reservoir capacity was 0.68 MM3.
  • The Karongi-13, scheme the study concerned a total area of 304ha corresponding to an annual irrigation water demand of 1.07 million cubic meters and included the design of a clay core homogenous dam of 22.5m height with a total embankment volume of 208,000m3 the reservoir capacity was 1.17 MM3.
  • The Gatsibo-8 scheme the study concerned a total area of 90ha irrigation and included the design of a clay core earthfill dam of 17.0m height with a total embankment volume of 172,410m3, the reservoir capacity was 0.6 MM3.

Z&A was involved with the detailed design of the irrigation networks in all sites with a total area of 1099 ha, the geological investigations and the full hydro geological assessment of the four dam site areas.

Water transmission and distribution networks designed for this project consisted of: (a) 32,000 m HDPE DN500 water pipes for Karongi-12 area, (b) 48,000 m HDPE DN630 water pipes for Karongi-13 area and (c) 21,000 m HDPE DN450 water pipes for Nyanza-23 area.

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News & Events

  • 16-06-2025

    Detail Design Study of the Chavria Irrigation Network

    June 2025. New Contract for Z&A in Greece related to Deisgn of irrigation network under the name ''Detail Design Study of the Chavria Irrigation Network''.
    The project to be studied in detail concerns the land improvement of 24,000 hectares of pure agricultural land, in a gross irrigable area of ​​approximately 26,600 hectares, in the Ormylia plain of South Chalkidiki -Greece.The photo is for the day of signing the contract with the Directorate of Flood Control and Land Improvement

    Photo Signing Contract Chavria Irrigation

    [more]
  • 27-03-2024

    CONSULTANCY SERVICES FOR DETAILED DESIGNS AND CONSTRUCTION SUPERVISION OF BLANTYRE WATER SUPPLY NETWORK UPGRADES

    February 2024

    Z&A as the leading firm of a J/V signed a new Water Supply related contract in Malawi. The consulting services include detailed designs and construction supervision of Blantyre Water Supply network upgrades. The Consultancy assignment shall be conducted in two phases: Phase 1–detailed design and tender documentation; and Phase 2–construction supervision and DMA establishment and commissioning.
    The assignment shall be completed within a period of Fifty- Eight (58) calendar months.

    Phase 1 of the consultancy assignment is expected to be conducted over a period of Ten (10) months and Phase 2 over a period of 48 months ths includes 12 months’ defects liability period)

    Below the photo of Overview map of the Blantyre main water assets.

    The 3 intakes and Water Treatment Plants are:
    • Walkers Ferry intake on the Shire River and WTP.
    • Mudi Dam intake and WTP
    • Lokhubula River intake and Nguludi WTP

    Overview map of the Blantyre main water assets.

     

    [more]
  • 15-01-2024

    CONSTRUCTION SUPERVISION OF THE WORKS AT THE EIGHT (08) DAMS AND PREPARATION OF OPERATION AND MAINTENANCE PLANS

    January 2024

    The Services to be provided by Z&A are organized in two part: Review the designs and ensure compliance with the technical specification and design solution of the works implemented by the contractor - Supervision of construction works and implementation of safeguard measures - Training activities for stakeholders such as dam committees and district local staff. 

    [more]
  • 20-12-2023

    Postgraduate program "Management of Infrastructure and Construction Projects"- National Technical University of Athens - Greece

    DECEMBER 2023

    Z&A was invited and did a presentation as part of the postgraduate program "Management of Infrastructure and Construction Projects" that was launched thanks to the partnership between the National Technical University of Athens - School of Civil Engineering and the GEK TERNA Group, which will finance the program for five years with half a million euros.
    The MSc Program aims at the specialization of young engineers in the administration and management of infrastructure and construction projects, with the use of new technologies, in further analysing the modern scientific concepts and implementation of techniques related to all stages of the projects' life cycle

    ΕΜΠ ΔΙΑΛΕΞΗ 1

    ΕΜΠ ΔΙΑΛΕΞΗ 2

    [more]
  • 29-11-2023

    PROVISION OF CONSULTING SERVICES FOR THE SUPERVISION OF THE CONSTRUCTION OF THE KAMMITSI AND ARCHANGELOS DAM

    IMG 20231129 WA0006

     

    The construction of the Kammitsi Dam (29,95 m height (from foundation), and Reservoir Capacity of 1.050.000 m3) in Cyprus continues. A visit by Z&A's Executive Director Mr Panos Antonaropoulos and Z&A's Technical Director Mr Aris Bakalis has taken place today to meet with the rest of Z&A's resident engineers and view real time the progress of works. Z&A is working closely with the client and the constructor for the successful completion of the project following Z&A’s core values Specialization, Integrity, and Excellence.

    IMG 20231129 WA0001

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  • 28-11-2023

    PROVISION OF ADVISORY SERVICES FOR CONSTRUCTION OF THE WASTEWATER COLLECTION NETWORK AND THE WASTEWATER TREATMENT STATION IN THE CITY OF CHRYSOCHOUS

    Following the signing of the contract the assigment has now started. The first meeting and field visit took place on the 28th of November.

    First meeting Chrisohous

     

    Field 2 Chrisohous

    [more]
  • 14-11-2023

    PROVISION OF ADVISORY SERVICES FOR CONSTRUCTION OF THE WASTEWATER COLLECTION NETWORK AND THE WASTEWATER TREATMENT STATION IN THE CITY OF CHRYSOCHOUS

    November 2023 New Contract was signed by Z&A's Executive Director, Mr Panos Antonaropoulos, as the leading company of a J/V in Cyprus regarding the The Wastewater Collection Network And The Wastewater Treatment Station In The City Of Chrysochous. The photos that follow are from the date of signing the new contract 1 CHRISOHOUS CONTRACT

     

    2 CHRISOHOUS CONTRACT

    [more]
  • 07-11-2023

    CONSULTANCY SERVICES FOR FEASIBILITY STUDIES FOR AMAGORO IRRIGATION SCHEME IN TORORO DISTRICT

    On the 7th of November 2023 a successful completion of a workshop took place in Uganda. Photos are from the workshop with Mr Panos Antonaropoulos Executive Director of Z&A and Prof Michael Kavvadas the Geotechnical Expert of the Study.

     

    Presentation Nov 2023

    Mr Panos Antonaropoulos

     

    Kavvadas Presentation

    Prof Micahel Kavvadas

    Dam

    Following the succesfull workshop; on the 8th of November 2023, a Dam training session for junior engineers of MWE Uganda was held. In the photo that follows we can see both Mr Antonaropoulos and Prof Kavvadas on the day of the training

    Amagoro Training Photo

    [more]
  • 27-10-2023

    E.U. DIRECTIVE 2000/60. 2ND REVISION OF RIVER BASIN MANAGEMENT PLANS OF THE 14 WATER DIVISIONS OF THE COUNTRY

    Ζ&A as leader of a J/V, in line with the requirements of the Framework Directive 2000/60/EC (Article 14) organised the public consultation in two different towns (Patras 20 Oct 2023, Kalamata 26 Oct 2023) under the project 2ND REVISION OF RIVER BASIN MANAGEMENT PLANS OF THE 14 WATER DIVISIONS OF THE COUNTRY. Two more meetings will be held . The first one in Corfu (02 Nov 2023) and the second one in Nafplio (10 Nov 2023).

    Z&A was represented by Mr Panos Antonaropoulos (Coordinator-Team Leader), Mrs Irene Sakellari (Hydrologist) and Mr Ioannis Katsaros (Hydrogeologist)

    Antonaropoulos

    On the right: Mr Panos Antonaropoulos

    Doc3

    On the right: Mrs Irene Sakellari

    [more]
  • 15-09-2023

    PROVISION OF DESIGN CONSULTANT SERVICES FOR (A) ADDITIONAL AND NEW STUDIES, (B) PREPARATION OF TENDER DOCUMENTS FOR THE ANNOUNCEMENT OF TENDERS, (C) EVALUATION OF BIDS, (D) SUPERVISION OF THE CONSTRUCTION WORKS OF THE SEWAGE SYSTEM IN GOVERNMENT SETTLEME

    On the 15th of September 2023 Z&A attended the Contract Signing Ceremony of the Contractor for the Construction Phase of the Assigment PROVISION OF DESIGN CONSULTANT SERVICES FOR
    (A) ADDITIONAL AND NEW STUDIES, (B) PREPARATION OF TENDER DOCUMENTS FOR THE ANNOUNCEMENT OF TENDERS, (C) EVALUATION OF BIDS, (D) SUPERVISION OF THE CONSTRUCTION WORKS OF THE SEWAGE SYSTEM IN GOVERNMENT SETTLEMENTS AND SELF-HOUSING SETTLEMENTS IN LIMASSOL, (E) SUPERVISION OF WORKS WITHIN THE RESIDENCES. Z&A will be supervising the works. Aris at SALA for the Contract

    Mr Aris Bakalis, represented Z&A in the CeremonyAris at SALA for the Contract 2

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Athens Headquarters

Dryadon 4, 152 33, Chalandri,  Athens, Greece

Phone numbers: +30 210 7220072, +30 210 7253310

Fax: +30 210 7231388

E-mail: central@z-a.gr

 

 

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Tel: +357 22 66 31 91

Fax: +357 22 66 31 92

E-mail: central@z-a.com.cy

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