survey of the irrigation potential of the lower tana river basin kenya

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- 26 - The upper basin is crossed by a branch line from Nairobi, which goes through Fort Ball and Nyeri to Nanyuki. Air communication is important, particularly to the lover basin, which, during the rainy season, is frequently isolated from the rest of the country. Garsen, Galole and Garissa have landing strips and services by light planes from Nairobi, Malindi and Mombasa - centres which are interconnected by regularly scheduled internal airline service. Geology, Seismology and Mineral Deposits Plate 4 shows the relationship of the Tana basin to the regional geology of eastern Kenya. The Basement System underlying the entire central massif of Kenya consists of folded Precambrian metamorphic rocks. These are overlaid in the west by younger volcanic rocks of Tertiary to Quaternary ages and in the east by sedimentary rocks of Carboniferous or Permean to Tertiary age and semiconsolidated sediments ranging in age from Tertiary to Recent, The entire area east of the Gregory Rift was reduced to a peneplain, and parts of the final Submiocene level are identifiable along the Kitui escarpment and elsewhere (3). Subsequent volcanic aotivity resulted in the build up of the Aberdares, Mount Kenya, the Nyambenis, Mount Kilimanjaro, and the surrounding upland region of Kenya. Farther east, downwarping of the peneplain was caused by deposition of later Tertiary and Quaternary sediments in an area referred to as the Tana Embayment. The higher-lying Old Alluvial part of the lower Tana basin, within which lies the major portion of the project lands, represents a Pleistocene erosion surface whereas the lower-lying floodplain of the Tana river is considered to be Eolocene valley fill, at least insofar as its upper soil layers are concerned. At the present time, the lower reaches of the riverlare incised within its own recent sediments. In common with the rest of East Africa, Kenya has suffered from earthquakes related to fault movements and volcanic activity. Almost invariably, the epicentres of earthquakes have been in the western part of the country, in the area of the Rift fault and its volcanoes. East of the Gregory Rift, in the area of Precambrian rock and farther east in the younger sedimentary areas, there is little danger from earthquakes. Nevertheless, shocks have been felt as far east as Mombasa and Malindi. Farther inland, perceptible tremors have been reported from Voi on the Mombasa-Nairobi road and in the north near Marsabit. No significant mineral deposits are known to exist in the middle and lower catchments of the Tana river, with the exception of gypsum, which has been identified at a number of locations west of Garissa. This, on test, has proven to be of low quality, although possibly suited to agricultural purposes.
ir LEGEND WVJ PL00O PLAia OCPOaiTS \ BAND, »ILT,CLAV) XXXM ADD MAaOAUU. aWAItP OIPOSIT» («ILT.CLATl |'::-.'..'-l MDtMNTS I OaAVKl .SAMO.aiLT.CLAV, URL t 1^ [ : . 1 LOCALLY CMtHTEO 1.»" 3 ÏOLCAKIC »ocm IV.V1 «0>TLT •«»«LI L«V« PlO«* P'"M BIOIMCNTART poena Z'.'.'/A MOtTLT tAHOtTOMt AHO LltttSTOM I I POLOID NOCK« 1 | intTLT miCAMtuii «IIA«O»»«IC Aa» laacout r~—"n laüIOU« IMTftuttVC aOCKa 1 «^ 1 «OttLt «»IIITM, ITUITII , «AiMO» SYMBOLS « » M » PAULTP - PNOaABLt NOTE QIOLOOICAl. OOUHOAaif» AKI A»MOKI«ATf. •ut* OP toni atOLOaiCAL PIATUM» AAI IIAaOMATID SOURCES OF DATA I matt >M aioioar UNITIHT t-wATi« oivtiopviiT atrAaratat lauavcT OP RCMVA . »mooi • •.p.- aaiiL pfToóLiua at»tLom«»T COUPANT op •••TA imiTie, ••••AOA • CALt 1 > »,OOOAOO 1CALI 0 40 M «LOMTCU ' »CALI 0 40 to mua 80VERNMENT OF KENYA UNITEO NATIONS SPECIAL FUND SURVEY OF IRRIGATION POTENTIAL LOWER TANA RIVER BASIN FOOO A» aanCULTUK OMUIl«'*» Of THE UMTEO MTMS EASTERN KENYA GENERAL GEOLOGY ILWCO /ACRES - PLATE 4 I
Page 1 and 2: ^ ISHIC LIBRAE? KE - 1968.06 Wageni
Page 3: Scanned from original by ISRIC - Wo
Page 6 and 7: - V - ABSTRACT This report describe
Page 8 and 9: FRONTISPIECE ABSTRACT CHAPTER I INT
Page 10 and 11: CHAPTER IX AGRICULTURAL DEVELOPMENT
Page 12 and 13: - 3d. Page No. APPENDIX I PLAN OF O
Page 14 and 15: •xiii LIST OF TABLES (Cont«d) go
Page 16 and 17: - XV - LIST OP PLATES No. Page Wo.
Page 18 and 19: - 2 In June 19^3 a preliminary miss
Page 20 and 21: A. CONCLUSIONS - 4 - SUMMARY OF CON
Page 22 and 23: -6- Sequential development of the p
Page 24 and 25: -8- 2.5 Scheme of Development for I
Page 26 and 27: •10- For a population of,say, 500
Page 28 and 29: - 12 - Expenditure on this scale, t
Page 30 and 31: -14- During the project, considerat
Page 32 and 33: 3.1 The Country - 16 - THE COUNTRY
Page 34: Physiography -18- On Plate 1, the e
Page 37 and 38: liOt 11JHS U2-VS-HOI-H
Page 39 and 40: - 23 - Table 3-1 - Long-term Averag
Page 44 and 45: Irrigation Projeot Area - 28 - Earl
Page 46 and 47: - 30 - METEOROLOGY ABI) HYDROLOGY C
Page 48 and 49: - 32 - In East Africa, meteorology
Page 50 and 51: Table 4-^2 - Long-term Average Flov
Page 52 and 53: -36- The East African Meteorologica
Page 54 and 55: Rainfall - Project Area -38- The an
Page 56 and 57: - 40 - Table 4-9 - Sedimentation Es
Page 58 and 59: -42- (d) Other. Topographic maps of
Page 60 and 61: -44- • Elsewhere within the lower
Page 62 and 63: -46- SOILS AMD VEOETATIOff CHAPTER
Page 64 and 65: 0 L A L L TJ V I A L T 0 U N a A L
Page 66 and 67: Mapping symbol of the associations
Page 68 and 69: Class Suitability for irrigation -5
Page 70 and 71: I, Class Suitability for irrigation
Page 72 and 73: -56- to continue and expand the app
Page 74 and 75: -58- •Pii-rfhAT rfiBflapeh with r
Page 76 and 77: -60- W A+ ÄW»Ä^»-«-««/»< %
Page 78 and 79: -62- AGRO-ECONOMIC STUDIE S CHAPTER
Page 80 and 81: Year 4.5 Low rate. -64- Table 8-2 -
Page 82 and 83: - 66 As the investment neeaasATy to
Page 84 and 85: 3UIX 3ÏVHd ICTMd uouTioa »-a î-a
Page 86 and 87: »LOCK 1 FARCCL ir S ACRM »TAOr i
Page 88 and 89: -72- Based on the foregoing, averag
Page 90 and 91: -74- POWER POTENTIAL AND MARKETS CB
Page 92 and 93:
-76- The Kinda-rnma développent oo
Page 94 and 95:
PEAK DEMANO (MW X K)0) T • 3 4 S
Page 96 and 97:
oc UI Q. < ui o CE UI as ui 8 10 30
Page 98 and 99:
-82- WATER RESOURCES PLANHTKO ATO P
Page 100 and 101:
-84- Tttule xi-d - Firm Flows and E
Page 102 and 103:
Irrlgation potential -86- Although
Page 104 and 105:
-88- On Plate 11, the schedule at w
Page 106 and 107:
-90- As discussed in Chapter X. fn?
Page 108 and 109:
-92- POWER DEVELOPMENT CHAPTER XII
Page 110 and 111:
-94- Tabje, JL2"J. ~ Head, Flow and
Page 112 and 113:
H -o\ \ ~ ~ PLATE 12
Page 114 and 115:
ICOUCNCC * tCOUCKCC • UMMN - l.'M
Page 116 and 117:
LOAD »ROWrH CONFLUENCE DEVELOPMENT
Page 118 and 119:
o X » 9 .a o z < 4 Ul 0. 1*60 NAIR
Page 120 and 121:
I- — 1 1 — i i — 1 • : i !
Page 122:
-106- 13«1 Potential Devaioptent -
Page 126 and 127:
-110- Thô large developments of ir
Page 128 and 129:
-112- 13.2 Potential Dev^Topssst -
Page 130 and 131:
-114- The full cost of derslcpssüt
Page 132:
13.7 Research and TVajsis^ Pontic -
Page 135 and 136:
-119- Table 13-3 Research and Train
Page 137 and 138:
-121- The population ultimately to
Page 139 and 140:
-123- Also considered in the same,
Page 141 and 142:
15.2 Specific Points -125- There is
Page 143 and 144:
- 127 - ECONOMIC EVALUATION CHAPTER
Page 145 and 146:
COL. Y E . TABLE.I6-IA INVESTMENTS
Page 147 and 148:
TABLE 16-IC INVESTMENTS FOR IRRIGAT
Page 149 and 150:
COL. TABLE 16-2A IRRIGATION DEVELOP
Page 151 and 152:
COL. i 2 .3 4 5 6 7 8 9 10 II 12 13
Page 153 and 154:
-137- ' The various investment, ann
Page 155 and 156:
3 s z 4 I ,., , S\ •1 IIUIHII T 1
Page 157 and 158:
i 1 liHtnn / / / / / r> ^ —T tl»
Page 159 and 160:
L E 6 E tl O BI B.2 Cl C.2 P P.20 P
Page 161 and 162:
-145- On the other hand, the type o
Page 163 and 164:
••• It • * ••> 1* "«
Page 165 and 166:
-149- been assumed to be £ 20 per
Page 167 and 168:
-151- Frora the preceding analyses,
Page 169 and 170:
COL. I. Y E 'A R 1 IRRIGATION DEVEL
Page 171 and 172:
- 155 - TABLE I6-5D TOTAL REQUIRED
Page 173 and 174:
- 157 -•• TABLE I6-6B FOREIGN C
Page 175 and 176:
- 159 - TABLE I6-6D FOREIGN CURRENC
Page 177 and 178:
-161- Erom the financial analysis d
Page 179 and 180:
-163- Further agronomio studies are
Page 181 and 182:
-165- PLAN OP OPERATION UNITED NATI
Page 183 and 184:
-167-. (V) Hydrologlcal investigati
Page 185 and 186:
-169- (II ) Fellowships - each for
Page 187 and 188:
(il) Equipment and Supplies (Cont'd
Page 189 and 190:
-173- 9. The privileges and immunit
Page 191 and 192:
-175- 24. Upon the arrival of the P
Page 193 and 194:
-177- III • BUDGET 32'.' In. addi
Page 195 and 196:
Project Managers Project Co-Manager
Page 197 and 198:
-181- REFERENCES APPENDIX IV 1. Cli
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