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The Project for Groundwater Resources Assessment in the Middle Awash River Basin in the Federal Democratic Republic of Ethiopia

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The Project for Groundwater Resources Assessment in the Middle Awash River Basin in the Federal Democratic Republic of Ethiopia The Federal Democratic Republic of Ethiopia Ministry of Water, Irrigation and Electricity THE PROJECT FOR GROUNDWATER RESOURCES ASSESSMENT IN THE MIDDLE AWASH RIVER BASIN IN THE FEDERAL DEMOCRATIC REPUBLIC OF ETHIOPIA FINAL REPORT GEOLOGICAL AND HYDROGEOLOGICAL MAPS December 2015 Japan International Cooperation Agency Kokusai Kogyo Co., Ltd. Composition of the Report Executive Summary Main Report Supporting Report Data Book Geological and Hydrogeological Maps This Report is prepared based on the price level and exchange rate of July 2015. The exchange rate is: US$1.0 = ETB20.6298 = JPY123.80 35°0'0"E 40°0'0"E 45°0'0"E 50°0'0"E 15°0'0"N ´ Mereb TIGRAY Tekeze Denakle Federal Democratic AFAR Republic of Ethiopia AMHARA Project Area Aysha Abbay Awash 10°0'0"N 10°0'0"N Addis Ababa Baro-Akobo OROMIA Wabi Shebele Aysha Omo-Gibe SOMALI REGION SOUTHERN REGIO Rift Valley Genale-Dawa Legend 5°0'0"N 5°0'0"N Study Area Region km Major Basin 02100 00400 35°0'0"E 40°0'0"E 45°0'0"E 㻸㼛㼏㼍㼠㼕㼛㼚㻌㼛㼒㻌㼠㼔㼑㻌㻿㼠㼡㼐㼥㻌㻭㼞㼑㼍㻌 38°0'0"E 39°0'0"E 40°0'0"E 41°0'0"E ! ! !! !! Meranga Tedo Ber 400000 500000 600000 Lake Yardi Gewane 700000 Dejen !! !! Wenz Yilu echti Yemistina !! W Molale Lake Dalay !! !! Jebuha !! Mama Midir a !! Legend y J em Alem Ketema a !! Ab Ada-a !! Jihur Goha Tsion Fetra !! Robit Study Area !! ! ´ ! !! Towns 10°0'0"N 10°0'0"N Mezezo Ejersa Tikur Chika !! !! Ejere N Shewa Enewari !! Capital 1100000 \ 1100000 !! Lake Ertele !! Tarma Ber Debre Sina ! !! !! 5 Regional Capital !! M Gebre Guracha Lemi !! Fiche !! !! !! u Major towns g Deneba !! e r W !! Other towns e nz Debre Birhan Project Area Mendida !! Major Rivers Debre Tsige !! !! Fitale Kachisi !! Roads !! Arb Gebeya W Shewa Ankober !! !! Erer Muke Ture Bike !! !! Chacha Trunk!! !! Gota Chifara !! !! Afdem Link !! Muger !! Duber !! Segele Alem Gebeya !! Sembo !! Main Access !! Biyo Karaba Feeder!! Boreda Sheno Ginager Melka Werer !! !! Deder !! !! !! Gola Chancho DobaCollector !! !! Gojo (Jeldu) !! !! New Proposed Sodoma Hirna !! !! Shola Gebeya Harawacha !! Sirtu Ager Arba Asebot Unclassified !! !! Sululta Chole !! !! Adis Amba !! !! Bube !! !! Asebe Teferi Mesala !! !! Arba Reketi Addis Abeba ! Ginchi Adis Alem ! Harew !! !! !! Berehet Merewa ! \ !! ! Rago 1000000 Ambo 1000000 !! !! Chefe Donsa ! ! 9°0'0"N 9°0'0"N Guba Koricha Mucha Roba !! Arerti !! !! Metehara Bedesa !! Melka Jilo !! Akaki !! Sire W Hararghe !! !! Godina !! Lake Dendi Teji !! Gelemso Lake Ala Semite !! Delajebo Lake Wenchi !! Debre Zeyit !! Welenchiti Gebiba !! Melka Kunture !! !! Tulu Bolo !! Bofa Anchar Bedeyi !! Dilila !! Hmero Bantu Liben !! !! !! Modjo Mechara !! !! Adulala Nazret Woliso !! !! 5! Addis Hiwot !! enz Abomsa (Tinsae Birhan) Arara h W !! !! was Tibila A !! Suten Melkasa Rukeyisa ! ! Hujufa ! !! ! Teferi Birhan Guna !! !! !! Roepeyh Ra !! !! m Ombole Lake Koka Dera is Bu-i !! Mine !! Alem Tena !! !! Koshim Aro Dimtu Midre Kebda !! Fulensa !! !! !! Magna !! Haro Kile Ramis ! !! ! Eurdo !! Meki Huruta !! !! Hagere Sernay Dida Adi Iteya !! !! Endibir Butajira !! ! !! ! 900000 Agemti 900000 !! Kutara Diksis !! Gunchire !! nz Loko e !! !! Kibet /DNH%HVHND !! Koshe W !! ele Kechemo eb !! Sh e Lake Ziway Kula Wabe t ! ! 8°0'0"N 8°0'0"N a Asela Beltu l ! Ziway ! !! i Lake Abijata !! Jima Arsi B !! km Lake Goletsho Adami Tulu Robi !! !! Wanje Hobe !! ! !! 0525 0 Dalocha Dinkiti !! !! Kurkura 400000 500000 Sagure 600000 700000 !! !! Sheik Hussein ! 38°0'0"E 39°0'0"E 40°0'0"E 41°0'0"E 㼀㼔㼑㻌㻹㼕㼐㼐㼘㼑㻌㻭㼣㼍㼟㼔㻌㻾㼕㼢㼑㼞㻌㻮㼍㼟㼕㼚㻌 LOCATION MAP CONTENTS Location Map Contents List of Tables List of Figures Abbreviations Page: 1 Survey Summary ............................................................. 1-1 1.1 Objective and area of the project ................................................................ 1-1 1.2 Methodology of the Project ........................................................................ 1-2 2 Summary of Geography and Geology ............................. 2-1 2.1 Summary of geography .............................................................................. 2-1 2.2 Regional geological and tectonic setting .................................................... 2-4 3 Geology ........................................................................... 3-1 3.1 Adama town, Mt. Boseti and its surrounding areas .................................... 3-1 3.1.1 General ............................................................................................ 3-1 3.1.2 Geological unit ................................................................................ 3-4 3.2 Kone – Mt. Fentale and its surrounding areas .......................................... 3-24 3.2.1 General .......................................................................................... 3-24 3.2.2 Geological unit .............................................................................. 3-26 3.3 Mojo town – Arerti town – Debre Birhan town and its surrounding areas .......................................................................................................... 3-44 3.3.1 General .......................................................................................... 3-44 3.3.2 Geological unit .............................................................................. 3-46 3.4 Awash town – Asebe Teferi town and its surrounding areas ................... 3-61 3.4.1 General .......................................................................................... 3-61 3.4.2 Geological unit .............................................................................. 3-62 3.5 Correlation of stratigraphy of each part of the study area ........................ 3-81 3.6 Correlation of stratigraphy with previous studies ..................................... 3-85 3.7 Geological structure .................................................................................. 3-87 3.7.1 Fault system .................................................................................. 3-87 3.7.2 Active structures ........................................................................... 3-87 3.8 Volcanic activity ....................................................................................... 3-88 3.8.1 Characteristics of volcanic topography in the middle Awash River basin .................................................................................... 3-88 3.8.2 Volcanic history in the middle Awash River Basin ...................... 3-91 4 Hydrogeology .................................................................. 4-1 i 4.1 Data collection of hydrogeology ................................................................ 4-1 4.2 Groundwater potential .............................................................................. 4-24 4.2.2 Classification and characteristic of aquifers ................................. 4-29 4.3 Hydrogeological map and groundwater flow ........................................... 4-40 4.4 Water quality testing ................................................................................. 4-44 4.4.1 Results of water quality testing ..................................................... 4-44 4.4.2 Analysis items and methodology .................................................. 4-50 4.4.3 Results of water quality testing ..................................................... 4-51 5 Geology and Hydrogeology around Lake Beseka ........... 5-1 5.1 Topography, geology and geological structure .......................................... 5-1 5.1.1 Topography ..................................................................................... 5-1 5.1.2 Geology ........................................................................................... 5-7 5.1.3 Geological structure ...................................................................... 5-29 5.2 Hydrogeology ........................................................................................... 5-30 5.2.1 Aquifer classification and groundwater flow ................................ 5-30 5.2.2 Hydrogeological map and cross-sections ..................................... 5-38 5.2.3 Results of water quality testing ..................................................... 5-41 ii List of Tables Page: Table 1.2.1: Satellite Image for Interpretation .............................................................. 1-3 Table 3.1.1: Stratigraphy in Adama Town-Mt. Boseti .................................................. 3-2 Table 3.1.2: Geological Succession along Adama Town-Mt. Boseti ............................ 3-6 Table 3.1.3: Geological Succession along Lake Koka – Hurita Town – Sire Town ......................................................................................................... 3-7 Table 3.2.1: Stratigraphy in Kone-Mt. Fentale and its Surrounding Areas ................. 3-25 Table 3.2.2: Geological Succession along Kone-Mt. Fentale ..................................... 3-27 Table 3.2.3: Geological Succession along Mt. Fentale – Awash Town ...................... 3-28 Table 3.3.1: Stratigraphy in Mojo Town-Arerti Town-Debre Birhan Town and Surrounding Areas .................................................................................. 3-45 Table 3.3.2: Mojo Town-Arerti Town -Debre Birhan Town ...................................... 3-51 Table 3.3.3: Mojo Town – Chefe Donsa Town – Debre Birhan Town ....................... 3-52 Table 3.3.4: Arerti Town – Melka Jiro Town ............................................................. 3-56 Table 3.4.1: Stratigraphy in Awash Town-Asebe Teferi Town .................................
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