A A A INDEX MAP HYDROGEOLOGICAL MAP OF - AGRE MARRYAM AREA Towns No. Description Lithology Productivity Classes !. ARJO AKAKI BESEKA NAZRET Region Capital 1 Extensive aquifer Unconsolidated sediments, A High !. Zone Capital with intergranular alluvium, elluvium, 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 37°0'0"E 38°0'0"E !. permeability colluvium, B Moderate HOSAINA-ASELA (! !. Woreda Capital

Laha !. N !.

Zefne A (! lacstrine sediments,

a

s Developed Area e g i G JIMMA HOSAINA ASELA

Wajifo poorly cemented sandstone C Low (!

a

r Roads a

Myzelo D 2 Extensive aquifers with Consolidated sediments and High, moderate, low

(! G

i

d Asphalt a b Chileshe o fracture and/or metamorphosed carbonate; (A, B, C) ! Morka ( 0 SODO - AWASA (! 0 62 Gravel Limestone, sandstone, shale, (Note: Not applicable 7 AA 7 karstic permeability 0 0 10 127 10 10 10 0 A 0 0.5 marl, evaporate marble in this map) 24.1 A 37.5A !. 4 DIME DILA DODOLA/GOBA Mela 35.9 Rivers Belta Neha Dila 40.5 Major Rivers 3 Extensive aquifers with Volcanic rocks, basalts, A High (! (! (! 0 A 0 0 fracture permeability rhyolites, trachytes, B Moderate Lakes ignimbrites C Low Swamp ARBA MINCH - AGRE MARRYAM Chichu 4 Localized aquifers with Non carbonate (! C Low Lake BAKO AHEREMARIAM NEGELE 53 (! fracture and intergranular metamorphic rocks, Ezo 0 A 0 D Poor (! M.Abaya-1 Guanguwa permeability granitic intrusives,dolerites

^_ !. 0 Boundaries a

l 5 Main geothermal areas Common occurrence of Moderate or high a KONSO - YABELO 7 Wacha S 126 7 Basin Boundary thermal groundwater in productivity (A,B) 00 00 !. Birbir 00 0 A 00 Mariyam 0 28.4 (! 45 A (Note: Not applicable 0 A 12.4 fractured volcanic ISTIFANOS HAYK YABELO WACHILE Laska 0 A 0 0 National Boundary !. Zada 0 rocks and subordinate in this map) Laska !. 0 (! Donki !. Has (! 0 5 unconsolidated sediments (! A K e n y a Koti 0 Birbir (!52.5 Spring Discharge [l/s] Bulki Adis 55.5 (! Yela Wulo !. 0 0 (! A 0 A 0 Kofe 0 Kode (! 0 0.01 - 0.75 Sezega (! Hamus 31.5 (! 0 0 Gelta Gebeya 52.5 A (! (! 44.8 36.8 88.5 a A 0.75 - 2.50 8.4 0 A 0 37.5 0 0 A

m A 0 30 (! Meho o 0 0 A 0 0 AQUIFER SURFACE CONTOUR

(! 0 0 Sokicha 300000 400000 (! K 56 2.50 - 6.00 1285m 45.2 A A (! 0 0 Laha Gidabo 1.6A 12.1 (! !.Selam Ber !.Zefne Wajifo 1 Kebado !. !. 0 (! 4 Bedesa Resa 6.00 - 16.00 Myzelo (! (! Debech Bekero (! (! Chileshe 00 9 5.4 (! Holjo 2400 (! A ! Morka (! 6 ( 6 (! L. Abaya Dila 7.4 Belta Mela Neha 1 !.Dara 90 90 (! (! 5 (! Shefete 90 90 Halemo 16.00 - 0 Sala L. Abaya Lekicha ! 0 (! ( 1600 (! 2400 50 (! Andida 0 Ezo (! 0 A Wacha (! Guanguwa !. 0 A 5.9 Birbir Mariyam J' Geological Structure !. Zada (! 1.2 Laska 2000(! 2300 Repe Donki! Has Bule (! 700000 !. ( !. Koti (! 700000 (! Bulki (!

(! !.Yela !. a (! Wulo Kode Adis Kofe

Dumerso (! !. (! s (! Gelta Hamus Gebeya (! Major fault, downthrown shown Sezega (! (!

r Bukisa Laska Meho Sokicha

! (! Chencha (! (! o ( 0 Zala Debech Resa 2200

(! Dita !. (! (! (! G Shefete Koma 2600 Yir-Ch-2 20.6 5 (! Holjo(! (! (! A Major fault Gorsa ! ^_ 15.6(! Dumerso ( Gelela Tulise Dido (! (! 2100 (! Gelela Dido(! Gulta 44.5 Normal fault, downthrow shown (! Gulta Yarte Shara Adame (! Shara (! (! (! Yarte (! (!0 3.7 2400 Kofele ! A Foge (! ( Adame Otolo (! 0 (! !. Gerse(! Normal fault Lante (! (! Gayle (! Haru 75.7 (! Konga Wachile 0 ! 0 A 48.5 Gina Kedida 0 ( (! 0 36.8 (! 0 Mora A 0 Inferred fault, downthrown shown 1600 ! 0 0 22.5 Layl 2 0 Widese( Yirga Belta Genta Gelana (! Wib Hamer Kemba (! (! (! 0 44.2 14.3 11.8 0 !. (! Beto Beza Ononcho 6 A 12.1 (! A A Wachile 6 (! (! (! 0A Foge (! Inferred fault !. !. Giwe 80 Otolo 0 60 6.4 0 Chefe 80 Yetnebersh (! Chorso Golja (! 80 80 82.8 (! Abel (! 0 5.4 0 0 Gerse (! A A 0 69.5 Melka Lole (! Toylo Arba Minch 0 A (! Kencho ! 0 Major fault, downthrown shown, by satellite images !. (! ( Gayle Lante 0 0 38 0 Metsir (! !. Tolta(! Zekusa Sigiga G (! Haru 0 32.4 (! Gerda Konga 0 0 (! 0 2 Weyto River A A 5.9 A A (! i 68 20.2 8.2 n 0 A 7.2 Major fault, by satellite images Zaba No.2 Chelelektu (! Tore a 0 5.5 1100 Ch'ep'o A 12.5 0 Zomba Gerese !. 12.5 (! (! 3.2(! A 2.2 Widese Getamir !. (! Normal fault, downthrow shown, by satellite images ! Gedeo Konga 11.3 ( (!Pila Sego Shele 1300 Sile 0 0 (! (! Sermele 0 Normal fault, by satellite images Aykamir Dimele Baya Kedida 0 A0 A 3.7 (!Geza (! ! 0 K ( 0 (! 1100 0 50.4 22.3 0 Bako (! Kele Derba u A A 23 18.8 (! 1 (!

a 0 46.5 A L. Chamo l Mora Inferred fault, downthrown shown, by satellite images 2 1500 !. f n 80 ! o 0 11.8 0 0 0 ( 0 Boshkoro Zeyse 1400

a A A Kure (!

! 0 (! 1200 1900 l 0 38.6 (

R 0 A 0 A 2000 2100 28.1 22.1 a (!

e A Alga 1800 Layl g

i Ononcho 0 Inferred fault, by satellite images !. 0

v 7.3 n 0

G (! (! 1600 7

Genta e o 1

! r 0 76.5 Belta ( (! Fisiha K (! Kaysa Wib (! Arkesha(! 37 A 2.2 0 A 0 85.5 Genet Geology boundary Benata Arguba Hamer BH7 0 1 (! (! (! Bonke !@ 0 0 3 Kemba A 0 0 A60 0 6 0 50.4 (! Biloya 6 41 J 25.4 24.8 A (! Inferred geology boundary 0 70 !. Beza A Adis 0 0 15.6 70 Beto !. 70 (! 7.7 70 0 A 0 A 0 A 27.7 Ketema 0 19.9 Kako Gidole 0 A 38.6 (! !. Agere Mariyam Giwe 0 103.6 Chorso Caldera edge (! !. 56.8 77 0 68.7 Golja A (! #* Sek'ama 0 A 0 0 A 0 0 Volcano / Volcanic Cone 0 0 84 49.5 Mashile 0 31.5 (! Gato 13.7 2 Abel (! A 0 0 (! Arba 0 A 68.7 A 0 A 0 22.4 0 Borehole (Well) Key Afer 1000 Gato Fuchicha 0 0 ! Toylo Minch 37.5 !. ( 40 50 60 70 80 90 00 10 20 30 !. 40 50 60 70 80 90 00 31.5 0A 0 10Sisota 20 Total depth [mbgl] Soyema A (! 52.5 Kebeda 0 A 0 0 !. Kencho (! 0 0 (! 0 A Gelabo

Chelelektu !. Sigiga 0 Specific capacity [l/min/m] A Static water level [m] (! 1300

a Gembo

6°0'0"N s Alduba (!

!

u ( Delbena

k (! 6°0'0"N Segen River e (! Z 600000 600000

K Draw down [m] u

l !

94 Gerda f (

(! o Iyanda

S Doketu(!

6 0 50 6 !@ 900 Bele Sayado (!

R ! A e (!

JICA Well Kolme !. (! g

60 0 i 60 (! 60 v 60 (!

e Weyto 1 (!

e Fasha n Mecheke (! 4 (! !

Zaba r ( 800 Didiga

R (! 0 No.2 0 (!

(! i v TEM

e Ch'ep'o r Tore 600 700 !. Survey Point of Transient-phenomenon Burka Gerese ^_ Dimeka

!. (or Time-domain) Electromagnetic Exploration Method !.

Zomba S

(! e

r 300000 400000 m

e

l e !. Gedeo Upper Aquifer Surface Contour SCALE 1:1,000,000 (! 100m interval 1000m interval 0 10 20 40 km le Shele Si (! G el an 6 a 6 FLUORIDE CONCENTRATION MAP (! Sego 300000 400000 50 50 50 50 (! Gocho Teferi Kela (! Laha Selam Ber Zefne Gidabo Dimele (! !. (! !. Wajifo L. Abaya !. (! Bedesa Myzelo Gigesa (! (! Geology (! Morka Chileshe L. Chamo (! (! Belta Mela Neha Dila Dara (! (! !. (!

Sala Luda a (! Derba Holocene Andida

1235m (! n (! (!

Bako a Ezo Guanguwa

(! l (! Chebicha !. e Wacha !. Kele Birbir Mariyam

G Al !. Zada (! Sokicha Jeba Laska Has (! 700000 Donki(! 700000 Alluvium;Fine sand - mud !.! !. Koti (! ( Bulki !.Yela (! Sire (! ! Adis Kofe !. ( Wulo Kode !. (! (! Gelta (! Hamus Gebeya Bule Laska Sezega (! Meho (! ! Chencha Ilacha Zala Debech ( Bekero(! Resa (! (! Dita !. (! (! (!

Zeyse Q Shefete Koma Boshkoro (! (! (! (! (! Unclassified Fluvial Deposits;Sandy gravel-mud Gorsa Repe Dumerso Holjo (! ! (! ( Gelela (! Dido (! Gulta Yarte Shara Adame(! 6 6 (! (! (! Kofele Foge (! !. 40 40 lac2 Otolo (! 40 40 Bulbla Lacstrine Deposits; (! !. Gerse(! Gayle Lante (! (! (! ! Haru 72 ( Konga Wachile Lake deposits such as gravel, sand and mud Gina Kedida (! (! 13.5 A 21 (! Mora ! (! Widese( 26.7 Layl Belta Genta (! Wib Hamer Kemba (! (! (! (! Beto Bonke Beza Adis Ketema Ononcho !. !. (! (!Giwe(! Pm Corbetti Pumice Flow & Fall Deposits; Yetnebersh (! Chorso Golja (! Abel (! Arba Minch (! Toylo Chelelektu Sigiga Pumice falls and pumice flow deposits Kencho !. (! (! Metsir (! !. Tolta(! Zekusa (! Gerda Konga Kaysa Weyto River (! Sisota (! Zaba No.2 (! Ch'ep'o Tore Vol Corbetti Rhyolitic Volcanics; Zomba Gerese !. W (! (! !. Getamir Gedeo Benata e Arguba (! (! Sego ! ! ( y ( Rhyolite lava flows and Obsidian lava flows Pila Shele (! (! Sile t Sermele o Aykamir Dimele Baya (! (! R Geza (! Luda i Bako (! Kele Derba Gelana v BH8 (! !@ (! e K rb Butajira Recent Basalt; !. Jeba Sire 6 r 117 6 Kure Boshkoro Zeyse ! (! 30 53.8 42.4 30 (! ( L. Chamo 30 A 30 Basalt lavas and reddish brown basaltic scoria (! Alga!. 20 (!

Arkesha(! Kaysa (! Benata Arguba lac1 Meki Lacustrine Deposits;Lake deposits such as (! (! 55 3.9 A 3.5 poorly-sorted gravel, sand, pumice, tuff, and volcanic sand Kako 2.9 (! Gidole Kako !. Agere Mariyam (! Gidole Ag-Ma-2 K' Pleistocene !. 40 50 60 70 80 90 00 10 !. 20 30 40 50 60 70 80 90 00 10 ^_ 20 Sek'ama Mashile Y Langano Poorly Welded Pumiceous Pyroclastics; ! Gato !. Agere ( (! Yellowish white rhyolitic pumice tuff Key Afer Gato Fuchicha Mariyam !. (! Soyema Kebeda !. 6 6 ob Kulumusa Highly Welded Tuff; Gelabo (! Gembo 20 20 Alduba (! 20 20 (! Delbena Sek'ama Rhyolitic to andestic welded tuff (! 600000 600000

(! Iyanda W Doketu(! Ketar River Acidic Volcanic Sedimentary Rocks; Bele Sayado (! !.(! Kolme (!Bekawile (! (! Rhyolitic tuffs and pumice tuffs Weyto Fasha(! (! (! (! Didiga Besa (! Mecheke Mashile (! (! Gato (! G Gonde Strongly Green Welded Tuff; Burka Rhyolitic to andestic welded tuff Dimeka !. Segen River

tb Adami Tulu Basaltic Pyroclastics; 300000 400000 Key Afer Gato !. 6 !. Fuchicha 6 Basaltic tuff breccias and lapilli tuffs 10 (! 10 10 10 Fluoride [mg/l] 0.0 - 1.5 1.5 - 3.0 3.0 - 10.0 10.0 - SCALE 1:1,000,000 ba 0 10 20 40 km

Ogolche Pleistocene Basalt;Massive basalt lavas !. S

e

g e ! ( (!

n Soyema GEOLOGICAL MAP (! R Lekansho Lacustrine Deposits;Lake deposits such as

!. lake 300000 (! 400000

i

v (!

e sand stone and alternate layer r Laha !. (! Selam Ber Zefne !. !. Wajifo !. (! L. Abaya Bedesa (! Myzelo Gigesa (! (! Morka Chileshe (! (! Gidabo Plio-Pleistocene Belta Mela Neha Dila Dara (! (! !. (! Sala Gelabo rh Gademotta Rhyolite; Andida ! (! ( Ezo Guanguwa (! (! Chebicha K Rhyolite lava flows and rhyolitic tuffs Wacha !.

e Gembo Birbir Mariyam !. (!

b Zada Sokicha Gewada Laska (!

(! Has e Donki! 700000 !. ( !. Koti (! 700000 6 6 (! Bulki (!

d !.Yela Alduba (! ! Adis Kofe !.

(! 0 ( Wulo Kode (! I ! !. 00 a 00 (! Gelta ( Hamus Gebeya Bule

00 0 42.4 y 00 N2b Laska Sezega (! Meho (! Ilacha A a (! Chencha ! Delbena N2b Basalt;Basalt lavas and basaltic pyroclastics Zala Debech Bekero(! Resa (

(! 20 n (! Dita !. (! (! (!

Koma d Shefete (! (! (!

a Gorsa Repe Dumerso Holjo (! NQs (! (! 46 Gelela (! Dido NQs Rhyolite;Rhyolitic tuffs (! Gulta Yarte Shara Adame(! 0 A 33 (! (! (! Kofele Foge (! 0 Otolo ! (! ( !. Gerse(! Lante (! (! Gayle (! Haru Pliocene (! Konga Wachile Gina Kedida (! (! (! Mora Widese(! Layl Belta Genta (! rht N1_2n Rhyolitic Volcanics; Plagiocrase rhyolite tuff and Wib Hamer (! (! (! (! Beto Kemba Adis Ketema Bonke Beza (! ! Ononcho 83 !. !. (! Giwe( Yetnebersh (! Chorso Golja 0 30.7 rhyolite lava flows containing obsidian (! Abel (! A (! Arba Minch (! 4.4 Toylo Chelelektu Sigiga Kencho !. (! (! Metsir (!

! Zekusa !. B Tolta( (! Gerda Konga Weyto River (! Sisota

70 e N1_2n N1_2n Rhyolitic Tuff; Plagiocrase rhyolitic tuff, 70 l Zaba No.2

e (! Ch'ep'o Tore

0 27 0 36 (! Gerese 5 A A S Doketu 93 Konso 5 pumice tuff and crystal tuff Zomba !. (! (! !

90 0 0 a !. 90 Getamir ( !. Gedeo 90 y 0 0 Bekawile 90 !

A (! ( (! Sego a Bekawile Pila Shele

0 ! ! d ( ( Sile (! N1n Sermele

o N1n Basalt; Anchar Basalt Aykamir Dimele Baya (!Geza (! Kolme (! Luda (! Bako (! Kele Derba Gelana (! (! 52 (! !. Zeyse Jeba Sire N1ar Kure Boshkoro ! 0 46 ! ( A (! (! ( L. Chamo N1ar Rhyolite; Rhyolite ! 0 Weyto ( Alga!. Fasha (! (! (! Mecheke (! Kaysa (! Arkesha! Miocene ( Benata Arguba (! (!

Didiga

B

e Ngs s a ! Sharenga Rhyolite; Rhyolite piles and necks

( Kako

(! Gidole B u r k ! a !. Agere Mariyam ( Ngu !. N Upper Basalt; Porous basalt lavas Sek'ama 5

000m. Mashile 80 (! Gato 80 80 Ngb Beyana Tuff; Lapilli tuff with minor laminated tuff (! 80 Key Afer 5 Gato Fuchicha !. (!

Soyema

Ngm Kebeda !.

N' Middle Basalt; Porphyritic basalt lavas

Gelabo i ! v e r e n n ( R e g S

W Gembo

Alduba (!

!

e ( Delbena

y (! t

74 o

Eocene-Oligocene 600000 600000 R

0 27 i

A v e 0 r Pgs (! Iyanda Shole Welded Tuff; Densely-welded rhyolitic welded tuff Doketu! Bele Sayado (! ( !.(! Kolme (!Bekawile (! (! 2 000m. 2 2 2 37°0'0"E2 2 3 3 3 3 3 3 3 3 3 38°0'0"E3 4 4 4 Weyto Fasha(! Pgl (! (! 40 E 50 60 A 70 80 90 00 10 20 30 40 50 60 70 80 90 00 10 20 Lower Basalt; Porphyritic basalt lavas (! Didiga Besa (! Mecheke (!

MESOZOIC Burka 0 10 20 40 Dimeka VERTICAL SCALE = 10 x HORIZONTALSCALE SCALE 1:250,000 km TRANSVERSE MERCATER PROJECTION Mes Adigrat Sandstone, Antaro Limestone; !. Segen River 300000 400000 Sandstone, Shale and Limestone !. (! 2,400 2,400 ^_ N' SCALE 1:1,000,000 PRECAMBRIAN Geology 0 10 20 40 km A C D E BH4 N I K L !. 2,300 2,300 Biotite Gneiss, Pegmatite; Holocene Plio-Pleistocene B BH9N BH3 J Konga R. Pgs Pgs Ag-Ma-2 Burka R. Burka R. T10-2 Pre 2,200 2,200 Al Alluvium; Fine sand - mud rh Gademotta Rhyolite; Rhyolite lava flows and rhyolitic tuffs BH10 Arsi Negele Shashemene Awasa Leku Dila Guanguwa Yir-Ch-2 Chelelektu Tore Pgs Agere Mariyam Biotite Gneiss, Granite, Biotite Metagranite 2,100 2,100 Q Unclassified Fluvial Deposits; Sandy gravel-mud N2b N2b Basalt; Basalt lavas and basaltic pyroclastics Yirga Chefe 2,000 2,000 Ngm lac2 Bulbla Lacstrine Deposits; Lake deposits such as gravel, sand and mud NQs NQs Rhyolite; Rhyolitic tuffs 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 1,900 1,900 Pgs Pre Pm Corbetti Pumice Flow & Fall Deposits; Pumice falls and pumice flow deposits Pliocene ob ob ob Pgs 1,800 Pm G lac2 Al lac2 lac2 G 1,800 Q Q Vol rht Vol Corbetti Rhyolitic Volcanics; Rhyolite lava flows and Obsidian lava flows N1_2n Rhyolitic Volcanics; Plagiocrase rhyolite tuff and rhyolite lava flows containing obsidian ba Al W ba Q Q 1,700 lac1 N2b Y W G 1,700 rb N1_2n N1_2n Rhyolitic Tuff; Plagiocrase rhyolitic tuff, pumice tuff and crystal tuff W tb W Pgl Pgl Butajira Recent Basalt; Basalt lavas and reddish brown basaltic scoria Lake Y W G rh G ba N1n 1,600 tb 1,600 lac1 Meki Lacustrine Deposits; Lake deposits such as poorly-sorted gravel, sand, pumice, tuff, and volcanic sand N1n Basalt; Anchar Basalt tb N1_2n tb N1ar 1,500 Pm ba rh 1,500ba N1ar Rhyolite; Rhyolite rht N2b rh ba Pre Pgl Pleistocene 1,400 rht 1,400 Y Langano Poorly Welded Pumiceous Pyroclastics; Yellowish white rhyolitic pumice tuff Miocene Ngs Sharenga Rhyolite; Rhyolite piles and necks 1,300 rht N1-2n 1,300 ob Kulumusa Highly Welded Tuff; Rhyolitic to andestic welded tuff Ngu Upper Basalt; Porous basalt lavas 1,200 1,200 W Ketar River Acidic Volcanic Sedimentary Rocks; Rhyolitic tuffs and pumice tuffs N1_2n Q Ngb 1,100 1,100 G Beyana Tuff; Lapilli tuff with minor laminated tuff Ngm Gonde Strongly Green Welded Tuff; Rhyolitic to andestic welded tuff Ngm Middle Basalt; Porphyritic basalt lavas 1,000 1,000 tb Adami Tulu Basaltic Pyroclastics; Basaltic tuff breccias and lapilli tuffs N2b Pre Q Eocene-Oligocene 900 900 ba Ogolche Pleistocene Basalt; Massive basalt lavas Ngm Pgs Shole Welded Tuff; Densely-welded rhyolitic welded tuff 800 800 lake Lekansho Lacustrine Deposits; Lake deposits such as sand stone and alternate layer 700 700 Pgl Lower Basalt; Porphyritic basalt lavas MESOZOIC 600 600 Mes 500 N1_2nN1_2n 500 Adigrat Sandstone, Antaro Limestone; Sandstone, Shale and Limestone 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 2000,000 210,000 220,000 23 0,000 240,000 250,000 26 0,000 27 0,000 280,000 290,000 3000,000 310,000 320,000 33 0,000 340,000 350,000 36 0,000 37 0,000 380,000 390,000 PRECAMBRIAN Pre Biotite Gneiss, Pegmatite; Biotite Gneiss, Granite, Biotite Metagranite 2,900 J 2,800 M I J' K 2,700 BH7 N 2,700 ・ The topographical map is based on Ethiopian Mapping Agency (EMA), 1979, 1994, 1995 and 1997 Yir-Ch-2 K' ・ Geological Map of the Ethiopian Rift,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1981 2,600 Ngm 2,600 M N ・ Hydrogeology of the Lakes Region, (Lakes Ziway, Langano, Abiyata, Shalla and Awassa),Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1982 Ngm BH8 Ag-Ma-2 ・ Geological Map of Omo River Project area,Ethiopian Institute of Geological Survey (EIGS), Ministry of Mines and Energy,1983 2,500 2,500 ・ Geothermal Exploration Project Ethiopian Lakes District Rift, exploitation of Langano-Aluto geothermal resources, Feasibility report,Ministry of Mines and Energy, elc electroconsult, Italy,1986 2,400 Yirga Chefe Pgs 2,400 ・ Geology of Agere Maryam Area,Geological Survey of Ethiopia (GSE),1994 Pgs ・ Hydrogeological, geophysical and engineering Geological Investigation of Yabelo Sheet,Geological Survey of Ethiopia (GSE),2000 2,300 2,300 Pgl ・ Hydrogeological and Engineering Geological Investigation of Chew Bahir Sheet,Geological Survey of Ethiopia (GSE),2000 ・ Geological Map of the Ziway - Shala Lakes Basin,Dainelli et al., Department of Earth Sciences, University of Florence, Italy,2001 2,200 2,200 ・ Geothermal resource Exploration in Abaya and Tulu Moye Gedemisa geothermal Prospects, Main Ethiopian Rift,Geological Survey of Ethiopia (GSE),2002 Ngm Pgl 2,100 2,100 ・ Hydrogeology and Engineering Geology of Awassa Lake Cachement,Geological Survey of Ethiopia (GSE),2003 Pgl ・ Geology Yabelo MapSheet,Geological Survey of Ethiopia (GSE),2007 2,000 2,000 ・ Butajira-Ziway Area Development Study Project, Hydrogical Map,Ministry of Water Resources, Ethiopian Water Technology Center (EWTEC),2008 1,900 Kulfo R. Gina R. Gelana R. 1,900 ・ Geological map of Rift Valley Lakes Basin,Ministry of Water Resources, Halcrow and GIRDC,2008 Q 1,800 Pgs Pgl 1,800 Arba Minch Pgl 1,700 Pgl 1,700 Pgl 1,600 1,600 Ngu Pgl Hydrogeological Map March 2012 Pgl Pgs Q 1,500 1,500 Q Abaya Lake Pgs Q Segen R. 1,400 Pgl 1,400 Q ba Q Pgl THE STUDY ON GROUNDWATER RESOURCES ASSESSMENT 1,300 1,300 Pgl Pgl Q 1,200 Q 1,200 IN THE RIFT VALLEY LAKES BASIN Pgl Pgl 1,100 Pgl Pgl 1,100 Ngs Pgl Pgl Q 1,000 Pgl 1,000 Pre Pre 900 900 JAPAN INTERNATIONAL COOPERATION AGENCY (JICA) 800 Pre 800