wood in 2009 valued at KES 86 million (US$ 1,146,667) (Table 4). The projected annualrevenue generation from plantations in the forest reserve is estimated on theassumption that the 3,000ha currently under plantation will be sustainably managed ona 25-year rotation. Thus 120ha will be available for harvesting annually on the assumedfinal stem density <strong>of</strong> 420 per hectare each yielding 1.2m 3 <strong>of</strong> roundwood. The <strong>Eastern</strong><strong>Mau</strong> Forest Reserve can produce an estimated stump volume <strong>of</strong> 60,000m 3 . At thecurrent price <strong>of</strong> KES 2,800/m 3 , this would generate an annual revenue <strong>of</strong> KES 168million (US$ 2.24 million).The <strong>Trans</strong> <strong>Mara</strong> forest comprises natural vegetation that does not allow any loggingconcession to be made. According to the Narok Zonal Forest Office the <strong>Trans</strong> <strong>Mara</strong>Forest Reserve is a protected forest with minimal extraction allowed, mostly forsubsistence firewood collection. Thus, the revenue generation from <strong>Trans</strong> <strong>Mara</strong> forestby KFS is minimal. The revenue generated by KFS in 2009 was KES 215,050 (US$ 2,868)with firewood <strong>and</strong> confiscated charcoal accounting for 42% each.According to the Narok County Council Office there is no legal extraction <strong>of</strong> treeproducts from the <strong>Maasai</strong> <strong>Mau</strong> Forest Reserve. Most <strong>of</strong> the forest is extensivelyencroached <strong>and</strong> no record <strong>of</strong> any products being harvested is available. However, theforest is undergoing serious logging <strong>and</strong> charcoal burning, <strong>and</strong> is heavily grazed bylivestock. It was not possible to collect any data on extraction rates for various productsfrom the <strong>Maasai</strong> <strong>Mau</strong> Forest Reserve because <strong>of</strong> the hostility <strong>of</strong> suspicious settlers.The revenue generated by the forest blocks in 2009 is KES 89,502,085 (US$ 1,193,361)with revenue from plantations accounting for 96% <strong>of</strong> this amount.Table 4: Roundwood production from East <strong>Mau</strong> Forest in 2009Station/quantity Volume produced (m 3 ) <strong>Value</strong> (KES)Kiptunga 17,313.04 43,282,602Baraget 16,404.26 41,010,638Logman 682.44 1,706,100<strong>Total</strong> 34,399.74 85,999,3403.2 Downstream <strong>Value</strong>s <strong>of</strong> the Forest Blocks32
The upper catchment <strong>of</strong> the <strong>Mara</strong> River Basin comprises a section characterized bylarge-scale agricultural farms, some <strong>of</strong> which are irrigated using water from the river. Inthe lower section, the <strong>Mara</strong> River runs through the open savannah grassl<strong>and</strong> protectedby the <strong>Maasai</strong> <strong>Mara</strong> Reserve on the Kenyan side <strong>and</strong> the Serengeti National Park on theTanzanian side. Just before the <strong>Mara</strong> River drains into Lake Victoria, there is a floodplain. The downstream value <strong>of</strong> the forests results principally from the support to thewildlife that attracts foreign currency <strong>and</strong> incomes to the country through tourism,irrigated agriculture <strong>and</strong> livestock support. The value <strong>of</strong> water to wildlife <strong>and</strong> thelodges has been captured through the value <strong>of</strong> the catchment to tourism.The <strong>Mara</strong> River Basin is critical for the supply <strong>of</strong> water to populations in Kenya <strong>and</strong>Tanzania. The total consumptive water dem<strong>and</strong> in the basin is estimated at 24 millioncubic metres per year where large-scale irrigation accounts for 51%, human domesticdem<strong>and</strong> 20% <strong>and</strong> livestock 17% (H<strong>of</strong>fman, 2007). Using these proportions, 6,505,175m 3<strong>of</strong> water are required to support livestock in the area. H<strong>of</strong>fman (2007) reported that thepopulation living in the Kenyan <strong>and</strong> Tanzanian part <strong>of</strong> the <strong>Mara</strong> River Basin was556,497 <strong>and</strong> 282,204 people respectively. Using proportional basis the dem<strong>and</strong> for waterfor households in the basin is 4.8 million cubic metres.A single borehole can provide water for 300 persons (IUCN, 2002). The total cost <strong>of</strong>constructing boreholes is assumed to be uniform in all areas <strong>of</strong> the river basin <strong>and</strong>include the cost <strong>of</strong> hydrological survey, borehole drilling, <strong>and</strong> annual boreholemaintenance <strong>and</strong> permit charges. The annual cost <strong>of</strong> drilling a borehole was estimatedas an average <strong>of</strong> the cost <strong>of</strong> drilling boreholes in six districts <strong>of</strong> the Mt. Elgon region(Obiri et al., 2009) as US$ 21,185. Annual borehole maintenance cost was US$ 1,476. Theboreholes would fall under class D type for licensing <strong>and</strong> thus the owners must pay theWater Resource Management Authority an additional US$ 533 as assessment cost <strong>and</strong>US$ 667 as permit charges for using the water. Using the replacement cost method, thelifespan <strong>of</strong> a borehole is 30 years (www.nationaldriller.com) <strong>and</strong> the cost incurred asreplacement cost <strong>of</strong> boreholes is US$ 1,237,984. Thus the total cost <strong>of</strong> boreholes tosupply water for domestic purposes in the <strong>Mara</strong> River Basin was estimated atUS$ 4,733,674 (Table 5).During the dry season, there is hardly any water in the river basin. Up to 30% <strong>of</strong> theanimals can be lost without the water provided by the <strong>Mara</strong> River. Indeed, in 2000pastoralists lost 35% <strong>of</strong> their cattle due to drought (Ottichilo et al., 2001; Reid et al.,2003). The dem<strong>and</strong> for water by livestock was estimated based on the H<strong>of</strong>fman (2007)study at 4.08 million cubic metres. With a daily dem<strong>and</strong> <strong>of</strong> 40 litres <strong>of</strong> water per cattle33