ASDP: Environmental And Social Management Framework

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About 500mm were recorded at Nyangao within a duration of 24 hours in 1990 whichresulted into extensive land slides from the escarpments of Makonde plateaux causingsevere floods. The flow regimes of the rivers in the basin follow closely the rainfall pattern.Many river channels are dry during the dry season.4.1.2.2 LakesTanzania shares three major lakes (Nyasa, Tanganyika and Victoria) with othercountries in the region. Other lakes in the country include Burigi, Eyasi, Magadi, Masoko,Manyara, Natron and Rukwa.Lake Nyasa BasinLake Nyasa, the third largest lake in Africa is about 560 km long and 75 km wide at itswidest point, with a total drainage area of about 132,000km 2 and a surface area of about33,000km 2 . The lake is an international drainage basin bordered by Tanzania in the northand northeast, Mozambique in the east, and Malawi in the south and west. The basinarea draining into the lake from the Tanzania side is about 37,000 km 2 .The lake isbounded by steep mountains, except in the south. Major rivers are Songwe (shared withMalawi), Kiwira, Lufirio, Ruhuhu, and Rumakali. The Ruhuhu River is its main tributary isin the northeast; the Shire (in the south), a tributary of the Zambezi, is the lake's soleoutlet. Its outlet is the Shire River; its largest tributary is the Ruhuhu. About threequarters of the lake is in Malawi; the rest is in Mozambique. The lake lies in the GreatAfrican Rift Valley, a large graben caused by crustal extension. It probably formed about40,000 years ago.The mean annual rainfall varies between 1000mm to over 2600mm. Much of this rainsoccur in the rainy season from November through May. The highest rainfall is recorded inthe northern part of Lake Nyasa, whereas a small portion on the lower Ruhuhu valleyrecords the lowest rainfall of about 800mm. The basin in general may be classified ashumid to sub-humid with abundant water resources 9 .Internal Drainage BasinThe Internal Drainage Basin is described as rivers/streams draining into a group of inlandwater bodies (lakes) that are located around the north-central part of the country. Thesystem, mainly of troughs and faults runs southward from Lake Natron at the border withKenya to central Tanzania in the Bahi depression and varies in width from 30-90 km. Totalbasin area on the Tanzanian side is about 153,800 km 2 .The major drainage systems in this basin includes: the Lake Eyasi System, which drainsareas in North Tabora Region and East Shinyanga by the Wembere and Manonga riversystems, the Lake Manyara System, the Bubu complex where important features are theBubu and Bubu swamps. Several other small independent lakes and swamps with no outletexisting in this basin include Lake Basuto and Lake Natron.9 Ministry of Water, The United Republic of Tanzania24/114
The basin is situated in the semi-arid region of Tanzania. The mean annual rainfall rangefrom 500 mm/yr at Bahi to 900mm/yr in the highlands of Mbulu district. Rainfall variesgreatly from year to year.Lake RukwaLake Rukwa basin is an internal drainage system which is described by all catchmentsdrawing into the lake with no outlet. The lake has a surface area of about 2,300 km 2 with atotal basin area of about 88,000 km 2 . Rukwa Basin may be divided into several distinctareas according to topography. The main characteristics are related to the Rift ValleySystem of East Africa.The Western part of the Lake rises rapidly to the Ufipa plateau. This area is very broken,with many small incised rivers flowing down the escarpment into Rukwa valley which runsfrom northeast to southeast. The northern side of the Rukwa Valley rises gently towardsLake Tanganyika basin. The East is dominated by the Mbeya range of mountains. TheAltitude varies from the Lake Level of 800m to 1500m a.m.s.l. on the Mbeya range.Lake Tanganyika BasinLake Tanganyika Basin is situated in the Western Part of the country. All the catchmentsthat drain in Lake Tanganyika constitute the Lake Tanganyika basin. The total catchmentsof Lake Tanganyika basin as a whole are 239.000km 2 and the area of the lake is 32,000km 2 . The land surface of the basin on Tanzania side is 151,000km 2 which contributes 60%of the total runoff to Lake Tanganyika.The basin is dominated by the Malagarasi river system which is 130,000 km 2 . The mainriver, the Malagarasi originates in the mountainous area close to the border with Burundi atan altitude of 1750 m.a.m.s.l. from where it runs northeasterly through hilly andmountainous landscape and then southward into the Malagarasi Swamps. Its majortributaries, the Myowosi and Igombe Rivers meet the Malagarasi in the seasonal LakeNyamagoma. The Ugalla and Ruchugi Rivers join the main river downstream of LakeNyamagoma. The river then runs west, through the Misito Escarpment where it forms therapids and waterfalls before entering Lake Tanganyika.The Ugalla River drains an area of approximately 52,000km 2 and before the confluencewith the Malagarasi, it passes through large areas of swamps and marshlands, forming theseasonal Lakes of Sagara and Ugalla.Other major tributaries are the Ruchugi River which drains the hilly landscape north ofKasulu, running in a southerly direction through a low, partly swampy, undulatinglandscape, before it enters the Malagarasi River at Uvinza.In addition to the Malagarasi, there are smaller basins draining into Lake Tanganyika. Tothe north west of Kigoma, the Luiche is an important river. The lower part of the river formsthe Luiche Delta which floods often during the rainy season.The rainfall regime is unimodal; there is one long wet season and a corresponding long dryseason. The wet season is from November-May and the dry season June - October. Themain part of basin has a mean annual rainfall of 800 - 1,000mm and the minimum expected25/114
Page 4 and 5: Development activities at the natio
Page 6 and 7: • Regional Level AuthoritiesThe r
Page 8: watershed management,ground water c
Page 11 and 12: 2.0 INTRODUCTIONThe Government of U
Page 13 and 14: Whereas, the Agricultural Sector De
Page 15 and 16: and requiring higher financing leve
Page 17 and 18: Types of Irrigation No. of Schemes
Page 19 and 20: 4.1.1 ClimateTanzania experiences a
Page 21 and 22: the other northern tributary, the R
Page 23: efore joining the Kisigo at Mtera.
Page 27 and 28: • Lake Tanganyika (shared with Co
Page 29 and 30: Table 4.4 12 The Nile River Basin:
Page 31 and 32: 4.1.4 Water Quality4.1.4.1 Ground W
Page 33 and 34: invertebrate species, while about 7
Page 35 and 36: Despite its potential and rich reso
Page 37 and 38: - declining soil fertility- many wo
Page 39 and 40: • 5.1 Environmental Assessment (O
Page 41 and 42: agrochemicals in WHO 24 classes IA,
Page 43 and 44: Therefore, for sub projects that in
Page 45 and 46: Summary of Requirements of Bank Saf
Page 47 and 48: esponsibility for social developmen
Page 49 and 50: to promote public awareness of envi
Page 51 and 52: consulted stakeholders and their si
Page 53 and 54: mainstream of decision making. The
Page 55 and 56: Mining Act, No. 17 of 1980,as amend
Page 57 and 58: • 6.12 International ConventionsT
Page 59 and 60: 7. DETERMINATION OF POTENTIAL ENVIR
Page 61 and 62: Water Contamination: Pollution. Poi
Page 63 and 64: Loss of Biodiversity and Habitats.I
Page 65 and 66: 7.3 Some Potential Social Concerns
Page 67 and 68: 8.0. INSTITUTIONAL ASSESSMENT AND F
Page 69 and 70: 8.2 Institutional Roles and Respons
Page 71 and 72: Program contained in section 8.4 of
Page 73 and 74: ASDP NSCASDP SECRETARIATASDP FACILI
Page 75 and 76:
• Safe management of Pesticides.
Page 77 and 78:
Table 9.1: Potential DADP Sub Proje
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o) Step FOUR: Following compliance
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9.3 Costs of the Environmental Soci
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10.2.1 Monitoring and Evaluation In
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to construction, operations and mai
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Table 10.1: Environmental Mitigatio
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Annex A: Verification of Safeguards
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IV. Involuntary Resettlement (OP 4.
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Other comments:i) If substantial re
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The BiophysicalandSocialEnvironment
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Annex CGuidelines for an Environmen
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1. Sub project DescriptionPlease pr
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7. Invasive plant species along fee
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ANNEX E 33GENERIC ENVIRONMENTAL AND
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Annex FGeneric Guidelines for Prepa
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ANNEX GENVIRONMENTAL AND SOCIAL APP
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12. Are there any other environment
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Annex HGuidelines for Assessment of
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• Overall assessment of challenge
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ASDP: Environmental And Social Management Framework

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