A

A GEOLOGICAL MAP OF KONSO - AREA !. ^_ INDEX MAP

2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 Towns

20 30 40 50 60 70 80 90 00 10 20 30 40 50 60 70 80 90 00 37°0'0"E 38°0'0"E N .! ARJO AKAKI BESEKA NAZRET Pre Pgl Ngu Pgl Q Region Capital Ngm Pre Pre Pgl Ngs Pre Q Pgs .! Pgs Ngu Ngu Ngm Pgl Zone Capital 6 Pre Pgs Ngm Pgl 6 20 20 Pgs 20 Q Pgl 20 .! Pgs ba Woreda Capital HOSAINA-ASELA Sek'ama Ngm Pre Ngu !( Pgs Developed Area Pre Pgs Pre Ngm Pgl Ngm Q Pgs Pgs Roads JIMMA HOSAINA ASELA Pgs Ngm Mashile Ngm Asphalt (! Pre Gato Pre Q Pre (! Gravel Ngm Pgs Ngm Pre Pre Pre SODO - AWASA Pre Pgl Pgl ba Rivers Pgl ba Pgl Q Key Afer Gato !. Ngu Pgl Major Rivers 6 Q Fuchicha 6 DIME 10 10 Pgs L (! 10 10 DILA DODOLA/GOBA Pgl Ngu Q Lakes

Pgl Pgl Q Ngs Swamp Soyema Pre !. Lake ba Pgs Ngm Q Ngm Ngu Ngm ARBA MINCH - AGRE MARRYAM Q Pre Ngs ba Q Ngb Boundaries Pre Ngs Q BAKO AHEREMARIAM NEGELE W

e Gelabo Basin Boundary y (! ba t

o

Pgs K Pre Pre R Pre

e Gembo

i Gewada b Pgs v (! Pre e Pre National Boundary 6 e Q 6

Alduba d

(! r 0

00 I a 00 KONSO - YABELO

00 Pre 0 42.4 y 00 Pgl Q

Delbena A a Ngm n (! 20 Ngm

Ngu d Pre Spring Discharge [l/s] Pre a ba Pgl Ngu 46 ISTIFANOS HAYK YABELO WACHILE 0 A 33 Pre Ngm 0.01 - 0.75 0 0.75 - 2.50 Pgs Pgl Pre ba K e n y a Pgs 2.50 - 6.00 Pgl 83 Ngs Ngm Ngm Q 0 A 30.7 Pgs (! 6.00 - 16.00 4.4 Pgl Pgs

B Ngm 16.00 -

70 e Ngs

70 l ba

e Pgl

0 27 0 36 (! 5 A A S 93 Konso 5 Pre (!

90 0 0 a Doketu !. 90 90 y 0 0 Bekawile 90 Pgl

A (! Ngs Ngs a Bekawile Ngm Ngu 0 Geological Structure

d (! Ngs

o Pre Ngs Kolme Ngs (! Ngs Ngm Ngs Major fault, downthrown shown Pgl (! 52 Pre 0 46 Pgl Pgl A (! Ngs Q Major fault 0 Weyto Fasha Pgl (! (! Mecheke Normal fault, downthrow shown (! Pre

Q Pre

B Normal fault

e

s Pre Pgl

a (! Q Pgl Pre

Ngm

Pre B

u Inferred fault, downthrown shown S r k

a

Pgl(! Pre e g

e

Pre n

R Inferred fault

i v Q e Ngm

580 Pgl r 580 80 80 Pgl Pgl Major fault, downthrown shown, by satellite images Pre Major fault, by satellite images Pgl Pgl Q Pre Normal fault, downthrow shown, by satellite images Pgl Pgl Pre Pgl Pre 74 Normal fault, by satellite images Pre Ngm 0 A 27 Ngu Pgl 20 30 40 50 60 0 70 80 90 00 10 20 30 40 50 60 70 80 Pgl 90 00 Inferred fault, downthrown shown, by satellite images Pre Pre Pgl Ngm Pgl Q Inferred fault, by satellite images Dimeka 51 Ngu Pgl !. 0 A 24.3 Pre 0 Pre Pgl Pgl Geology boundary Ngu Pgl Inferred geology boundary 5 Pgl 5 70 Pre Pgl 70 70 Ngu 70 Pre Q Ngm Pgl Caldera edge Ngm Pgl Ngm Ngm Ngm Pre #*

T10-2 Volcano / Volcanic Cone

Pre N ^_ ' Pgl Pgl Borehole (Well) Chebi Pgl (! Total depth [mbgl] Chebi Pgl Ngm Pgl Dera Specific capacity [l/min/m] A Static water level [m] (!

W Dera

e

y Pre Pgl t Draw down [m] o Ngm Ngu Pgl

R

i 5 v 5 !@ 60 e 60 JICA Well r 60 Ngm !. 60 Pgl Pgl Q Ngs Ngm TEM Ngm Pgl Ngm Ngu Pgl Survey Point of Transient-phenomenon Pgl Pgl ^_ Ngm (! Ngm (or Time-domain) Electromagnetic Exploration Method Ngm Pgl Pgl N " N

0 Pgs L ' Ngu " 0 0 '

° 52 ' 0

5 Ngu 0 A 16 ° 0 Ngu 5 Ngm 5 Ngu 5 Ngu Pre Geology 50 50 Ngu 50 Pgl Q 50 Ngm Ngu Pgl Q Ngu Pre Q Ngm Pre Holocene Ngu Ngu Ngu Al Alluvium; Fine sand - mud Pgl Ngu Q Pgl Q Unclassified Fluvial Deposits; Sandy gravel-mud Q lac2 Bulbla Lacstrine Deposits; Lake deposits such as gravel, sand and mud W Pgs ey Yabelo Pm to Pre Pre !. Corbetti Pumice Flow & Fall Deposits; Pumice falls and pumice flow deposits 5 30 R Ngu 5 40 iv Ngu Pgs 40 0 2 40 e 40 A r Pre 0 Vol Corbetti Rhyolitic Volcanics; Rhyolite lava flows and Obsidian lava flows Ngu rb Butajira Recent Basalt; Basalt lavas and reddish brown basaltic scoria Ngu lac1 Ngu Meki Lacustrine Deposits; Lake deposits such as poorly-sorted gravel, sand, pumice, tuff, and volcanic sand Pre Ngu Pre Pgs Pleistocene Ngu Y Pgl 5 Pgl Pre 5 Langano Poorly Welded Pumiceous Pyroclastics; Yellowish white rhyolitic pumice tuff 30 30 Ngu Pgs 30 Q 30 ob Ngu Kulumusa Highly Welded Tuff; Rhyolitic to andestic welded tuff

Ngu W Pgs Ketar River Acidic Volcanic Sedimentary Rocks; Rhyolitic tuffs and pumice tuffs Pgs Ngu Pgs Ngu Pgs 20 30 40 50 60 70 80 90 00 10 20 30 40 50 60 70 80 90 00 G Pgs Ngu Ngu Gonde Strongly Green Welded Tuff; Rhyolitic to andestic welded tuff Ngu Ngu tb Adami Tulu Basaltic Pyroclastics; Basaltic tuff breccias and lapilli tuffs Chew ba 5 Bahir 5 Pgs Ogolche Pleistocene Basalt; Massive basalt lavas 20 Ngu 20 20 Ngu 20 lake Ngu Lekansho Lacustrine Deposits; Lake deposits such as sand stone and alternate layer Ngu Ngu Ngu Plio-Pleistocene Ngu Ngu rh Gademotta Rhyolite; Rhyolite lava flows and rhyolitic tuffs Pgs Ngu Ngu N2b Ngu Ngu Ngu Ngu N2b Basalt; Basalt lavas and basaltic pyroclastics Pgs Ngm Pgs 5 Pgs 5 NQs 10 Pgs Pgs Ngu 10 10 10 NQs Rhyolite; Rhyolitic tuffs ba Ngu Pgs Pre Ngu Pliocene Ngu Pgs rht ba Pre Ngu N1_2n Rhyolitic Volcanics; Plagiocrase rhyolite tuff and rhyolite lava flows containing obsidian Q Ngu Q Pgs N1_2n Pre ba N1_2n Rhyolitic Tuff; Plagiocrase rhyolitic tuff, pumice tuff and crystal tuff Pgs Q Ngu N1n ba N1n Basalt; Anchar Basalt Q Q Pgs Ngu 5 Ngu ba 5 N1ar 00 ba 00 00 00 N1ar Rhyolite; Rhyolite Ngu Ngu Q Ngm Miocene Q Ngu Ngu Ngs Ngu Sharenga Rhyolite; Rhyolite piles and necks Ngu Pgs Ngm Ngu Ngu Ngu Ngu Upper Basalt; Porous basalt lavas Ngm Pgs Pgs Pgs Ngu Ngu Ngb Ngm Beyana Tuff; Lapilli tuff with minor laminated tuff

4 4 Ngm 90 90 90 90 Middle Basalt; Porphyritic basalt lavas

ba Ngm Eocene-Oligocene Pgs Ngu Shole Welded Tuff; Densely-welded rhyolitic welded tuff Ngu Pgl Lower Basalt; Porphyritic basalt lavas K e n y a Ngm Ngu Ngu MESOZOIC N .

m Mes 0

0 4 Adigrat Sandstone, Antaro Limestone; Sandstone, Shale and Limestone 0 Ngu Q 80 0

8 37°0'0"E 38°0'0"E 4 220000m.E 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 PRECAMBRIAN Pre 0 10 20 40 Biotite Gneiss, Pegmatite; Biotite Gneiss, Granite, Biotite Metagranite VERTICAL SCALE = 10 x HORIZONTALSCALE SCALE 1:250,000 km TRANSVERSE MERCATER PROJECTION

2,400 2,400 C E BH4 K 2,300 A D I N 2,300 L N' ・ The topographical map is based on Ethiopian Mapping Agency (EMA), 1979, 1994, 1995 and 1997 B BH9N BH3 J Konga R. Pgs Pgs Ag-Ma-2 Burka R. Burka R. T10-2 ・ Geological Map of the Ethiopian Rift,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1981 2,200 2,200 2,200 ・ Hydrogeology of the Lakes Region, (Lakes Ziway, Langano, Abiyata, Shalla and Awassa),Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1982 2,100 BH10 Arsi Negele Shashemene Awasa Leku Kebado Dila Guanguwa M Yir-Ch-2 Chelelektu Tore N Pgs Agere Mariyam 2,100 ・ Geological Map of Omo River Project area,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1983 L 2,100 L' ・ Geothermal Exploration Project Ethiopian Lakes District Rift, exploitation of Langano-Aluto geothermal resources, Feasibility report,Ministry of Mines and Energy, elc electroconsult, Italy,1986 Yirga Chefe T10-2 2,000 2,000 Ngm 2,000 ・ Geology of Agere Maryam Area,Geological Survey of Ethiopia (GSE),1994 Langano Lake Tiliku Dedaba R. Laftu R. Melka Oda R. Denbi R. Tikur Wiha R. rh Gidabo R. Kola R. W Gigesa R. Dara R. Sala R. Pgl ・ Hydrogeological, geophysical and engineering Geological Investigation of Yabelo Sheet,Geological Survey of Ethiopia (GSE),2000 1,900 1,900 Pgs 1,900 ・ Hydrogeological and Engineering Geological Investigation of Chew Bahir Sheet,Geological Survey of Ethiopia (GSE),2000 Pgs Pre 1,800 Pm G ob ob ob lac2 Al lac2 lac2 G 1,800 1,800 Q Q ・ Geological Map of the Ziway - Shala Lakes Basin,Dainelli et al., Department of Earth Sciences, University of Florence, Italy,2001 ba Vol Y ba Pgl Q ・ Geothermal resource Exploration in and Tulu Moye Gedemisa geothermal Prospects, Main Ethiopian Rift,Geological Survey of Ethiopia (GSE),2002 lac1 N2b Al W Al ob W G Pgl Konso Q ・ Hydrogeology and Engineering Geology of Awassa Lake Cachement,Geological Survey of Ethiopia (GSE),2003 1,700 Y W W 1,700 Pgl 1,700 W W Y W G tb W Q Pgl ・ Geology Yabelo MapSheet,Geological Survey of Ethiopia (GSE),2007 Lake G rh G 1,600 ba ・ Butajira-Ziway Area Development Study Project, Hydrogical Map,Ministry of Water Resources, Ethiopian Water Technology Center (EWTEC),2008 1,600 W tb tb G 1,600 G tb G sample lost N1_2n tb tb 1,500 ・ Geological map of Rift Valley Lakes Basin,Ministry of Water Resources, Halcrow and GIRDC,2008 1,500 Pm N1_2n ba ba rh ba 1,500 rht N2b rh ba Pre Q Pre Pgl 1,400 rht rh 1,400 1,400 1,300 Pgl Q Pgs 1,300 rht N1-2n 1,300 1,200 Pgl Segen R. 1,200 Q Q 1,200 Geological Map March 2012 1,100 N1_2n 1,100 1,100 Q Pre Q Ngm 1,000 1,000 Q 1,000 N2b 900 Pre Q THE STUDY ON GROUNDWATER RESOURCES ASSESSMENT 900 Ngm 900 800 800 800 Ngm IN THE RIFT VALLEY LAKES BASIN 700 700 Ngm Pre 700 600 600 500 600 500 N1_2n 500 JAPAN INTERNATIONAL COOPERATION AGENCY (JICA) 0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 100,000 110,000 120,000 13 0,000 140,000 150,000 16 0,000 17 0,000 180,000 190,000 200,000 210,000 220,000 23 0,000 240,000 250,000 26 0,000 27 0,000 280,000 290,000 300,000 310,000 320,000 33 0,000 340,000 350,000 36 0,000 37 0,000 380,000 390,000