Game Theory
JF-Expert Member
- Sep 5, 2006
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Inasemakana kuwa huu mradi ulisimamishwa
kulikoni?
kulikoni?
Stiglers Gorge iko Ndani ya Pori la akiba la Selous. Ni sehemu mito mitatu inapokutana na kujenga dam eneo hili kunahitaji Environmental Impact Assessment ya hali ya juu. Uwepo wa machine kubwa, wafanyakazi lukuki, nk katika eneo hili wakati wa ujenzi kunahitaji mipango ya hali ya juu ili kuzuia poaching nk.
Ni mradi mzuri na naamini unahitaji kupewa "push". One complete the minimum amount of power that will be produced is 1500MW!
Environmental Impact Assessment ilionyesha mradi huu una hasara kuliko faida. Na mimi nakubaliana nao.
Amandla........
Tathmini ya Athari kwa MazingiraEnvironmental Impact Assessment ni nini kwa Kiswahili?
Hakuna maporomoko katika Stieger's Gorge. 'Gorge' siyo "Water Falls."Zungu Pule said:Stieglers Gorge (Stigo) ni maporomoko ya maji kwenye mto Rufiji. Maporomoko haya yapo eneo liitwalo Kibesa ndani ya Pori la Selous. Na sisehemu ambayo mito mitatu inakutana na kujenga dam........if there's a dam anyway
Environmental Impact Assessment ilionyesha mradi huu una hasara kuliko faida. Na mimi nakubaliana nao.
Amandla........
Fundi Mchundo:
Mimi sio mtaalamu na wala sikuhusika na mradi huu lakini nilichosikia ni hiki:
1. Bwawa lingefunika sehemu kubwa tu ya hifadhi ya Selous. Kwa kufanya hivyo tungepoteza utajiri mkubwa wa viumbe, mimea n.k. vinavyoshamiri humo.
2. Kwa kuzuia flow ya mto Rufiji, mradi ungepunguza kwa kiasi kikubwa virutubwisho vinavyobebwa na mto kwenda kwenye Rufiji Delta. Hii ingekuwa na athari kubwa kwa mikoko, samaki na viumbe vingine vyote vinavyo shamiri kwenye delta hiyo.
3. Maji yanayotoka katika Dam hiyo yangekuwa na temperature tofauti na ilivyo kawaida. Hii nayo ingeathiri uhai wa viumbe vinavyotegemea mto huo.
4. Bwawa lingejaa tope kwa haraka kiasi kwamba baada ya muda si mrefu sana, uzalishaji wa umeme ungeathirika.
5.Palikuwa na hisia kubwa kuwa mabwawa makubwa yanasababisha kuongezeka kwa matetemeko ya ardhi. hali hii imeanza kutokea China ambako walipuuzia ushauri na kujenga mabwawa makubwa.
Yote haya ni irreversible. Tukishaharibu eco-system ya eneo hilo ndiyo basi. Kwa mtaji huo, mradi hauna tija kwa taifa letu na vizazi vitakavyotufuata.
Amandla.........
Usilete masuala ya kusikia mkuu; kama ni kusikia tu, hata mie nimesikia kuwa hiyo tathmini ya mazingira ilitolewa kisanii tu ... ili mradi usifanyike na wakubwa waendelee na mipango ya umeme wa dharura.
Seismicity and tectonics of the stiegler's gorge area, Tanzania
Bungum, Hilmar; Nnko, Abdueli A.
Journal of Geophysical Research, Volume 89, Issue B3, p. 1874-1888
A microearthquake network with six stations and a diameter of about 50 km has been in operation in the Stiegler's Gorge area (Rufiji Basin), Tanzania, between 1978 and 1981. The network, which used radiotelemetry and digital recording at 30 Hz based on a triggering system, has recorded a large number of teleseismic and regional earthquakes in addition to several thousand local ones within the network. Most of the locally recorded earthquakes are in magnitude range 0-4 measured on a duration magnitude scale which has been developed for the area, a scale which also satisfactorily covers regional earthquakes with distance up to 25°. An active and well-defined seismicity zone has been delineated in the Stiegler's Gorge area, striking N140°E and dipping 45°NE, with events distributed between 0 and 40 km in depth. The time and space development of the local seismicity shows a fairly stable pattern, and a detailed focal mechanism study within the most active zone shows a predominance for normal faulting, with eastwest extensional movements. This is consistent with results from local geological studies, even though there is no clear correlation between the seismicity and locally mapped faults, and it also consistent with our knowledge of the regional tectonics of the East African Rift System.
A major hydroelectric project at Stiegler's Gorge is in the planning stage. T
he dam is being designed for multipurpose use, including electricity generation, flood control, irrigation agriculture and fishery. The dam will result in a flood probability of only 6 out of 22 years on the Rufiji floodplain compared to 19 out of 22 years prior to impoundment. Bernacsek (1980a) predicted long-term declines of at least 42–58 percent in floodplain fish catches. Since the dam will not be able to eliminate flood risk and as current agricultural practices on the floodplain are attuned to sequential wet and dry season crops (the former irrigated, of course, by natural floods), serious consideration is being given to the annual release of artificial floods for irrigation even though this may reduce somewhat the hydroelectric output.
The effect of river bed erosion will however progressively increase, over time, the regulated flood discharge required to produce adequate flooding, and eventually a stage may be reached where regulated flooding becomes incompatible with even minimum economical power generation. The long-term prospects for the Rufiji floodplain fishery are therefore poor. Bernacsek (1980a) suggested that provisions should be made to conserve water levels in the small permanent floodplain lakes. Catches of possibly as much as 1 000 t/y might be obtained from the lakes and the main river channel, while the residual deficit could be made up from reservoir and/or marine yields.
Since the Stiegler's Gorge dam will isolate the lower Rufiji fish stocks from the rest of the basin, the Internal Delta will represent the only long-term prospect for breeding and nursery grounds for migratory species of the lower Rufiji. The Internal Delta should therefore be designated a fish sanctuary. The hydrological regime of the Internal Delta could easily be maintained by the release annually of a very short duration flood.
Fundi M:
Tu-provie authenticity ya hiyo ripoti. Pili, karibu mabwawa yote ya umeme -- Kidatu, Mtera, Kihansi, Nyumba ya Mungu yamo katika hiyo EA Rift Valley System, na hivyo katika volcanic/erathquake activity region. Yanadunda hadi leo.
Mkuu Kipunguni,
Mimi sio mtaalamu na wala sikuhusika na mradi huu lakini nilichosikia ni hiki:
1. Bwawa lingefunika sehemu kubwa tu ya hifadhi ya Selous. Kwa kufanya hivyo tungepoteza utajiri mkubwa wa viumbe, mimea n.k. vinavyoshamiri humo.
2. Kwa kuzuia flow ya mto Rufiji, mradi ungepunguza kwa kiasi kikubwa virutubwisho vinavyobebwa na mto kwenda kwenye Rufiji Delta. Hii ingekuwa na athari kubwa kwa mikoko, samaki na viumbe vingine vyote vinavyo shamiri kwenye delta hiyo.
3. Maji yanayotoka katika Dam hiyo yangekuwa na temperature tofauti na ilivyo kawaida. Hii nayo ingeathiri uhai wa viumbe vinavyotegemea mto huo.
4. Bwawa lingejaa tope kwa haraka kiasi kwamba baada ya muda si mrefu sana, uzalishaji wa umeme ungeathirika.
5.Palikuwa na hisia kubwa kuwa mabwawa makubwa yanasababisha kuongezeka kwa matetemeko ya ardhi. hali hii imeanza kutokea China ambako walipuuzia ushauri na kujenga mabwawa makubwa.
Yote haya ni irreversible. Tukishaharibu eco-system ya eneo hilo ndiyo basi. Kwa mtaji huo, mradi hauna tija kwa taifa letu na vizazi vitakavyotufuata.
Amandla.........
Stieglers Gorge (Stigo) ni maporomoko ya maji kwenye mto Rufiji. Maporomoko haya yapo eneo liitwalo Kibesa ndani ya Pori la Selous. Na sisehemu ambayo mito mitatu inakutana na kujenga dam........if there's a dam anyway
Kikwete misses out on legacy
CORRUPTION, GOVERNMENT BUREAUCRACY SABOTAGING PRESIDENCY-DEFINING PROJECT
Dar es Salaam
A giant $2 billion project that could have potentially defined President Jakaya Kikwete's legacy is being held back by corruption, government bureaucracy and lack of political will, THISDAY can reveal today.
The proposed 2,100 megawatt (MW) Stiegler's Gorge hydro-power station was initiated by former President Julius Nyerere's government, but successive administrations under presidents Ali Hassan Mwinyi, Benjamin Mkapa and now Kikwete have all somehow failed to implement the project.
A detailed feasibility on the project funded by the Norwegian government was carried out in the early 1980s and showed enormous benefits from the envisaged power plant, but the initiative has since been shelved for decades.
The official explanation from the government has been a lack of funds, but well-placed sources have revealed to THISDAY how large-scale corruption may have played a prominent role in sabotaging the project.
"Powerful business tycoons and senior government officials who have been benefiting from corrupt contracts in emergency power generation deals such as Richmond, IPTL and others have been systematically blocking the Stiegler's Gorge project," said an official close to the government.
"Kikwete himself has been misled into thinking that this project is too big and too costly, hence it would take too long to build the power plant. The president has now falsely given up hope of implementing this project during his ten-year rule."
President Kikwete told Parliament last month that it could take up to a decade for the proposed Stiegler's Gorge hydro-power station to be up and running.
But experts told THISDAY the president could have been deliberately misled by senior government officials into thinking construction of the project could not be possible.
"There are some senior people in government who are benefiting from the ongoing power rationing because it gives them the chance to get illegal kickbacks from emergency power generation contracts," said one official in the energy sector.
"If the Stiegler's Gorge power plant was built and starts generating 2,100 MW, it would mean the end of Songas, IPTL, Dowans and other similar projects."
Tanzania has energy demand close to 900 MW capacity, but produces less than 800 MW.
The state-run Tanzania Electric Supply Company (TANESCO) has for the past two weeks been carrying out power rationing countrywide after a drought at hydro-power stations and breakdowns at gas turbines eroded electricity supplies to the national power grid.
If the Stiegler's Gorge power plant was built, Tanzania would have more than 1,000 MW of excess electricity.
According to the Director-General of the state-run Rufiji Basin Development Authority (RUBADA), Aloyce Masanja, it was feasible to construct the power plant in just five years using Brazilian technology.
"Stiegler's Gorge will be a source of cheap, abundant energy ... The power will be at a low cost of around 2 US Cents per kilowatt hour," he told THISDAY in an interview in Dar es Salaam.
Average electricity tariffs currently stand at 111 shillings per kilo-watt hour (kWh), against an average power generating cost of 152 shilling per kWh.
Masanja said construction of the Stiegler's Gorge project could be completed within just five years, contrary to claims that it could take decades to build the power station.
The project would involve installation of three giant underground turbines, each with the capacity of producing 700-megawatts of electricity.
"If we start implementing it immediately, the feasibility study can be updated in 2011 and we can start installing the first turbine in 2012. By 2015, the project should be fully completed and we can start enjoying 2,100 megawatts of electricity," he said.
The Minister for Foreign Affairs and International Cooperation, Bernard Membe, and other officials held talks with their Brazilian counterparts in Sao Paolo in September on the construction of the proposed Stiegler's Gorge hydro-power station.
"We expect a government delegation from Brazil to arrive in Dar es Salaam this December for further discussions on the project," said Masanja.
Insiders revealed that senior government officials in the Ministry of Energy and Minerals, TANESCO and elsewhere have been systematically blocking the Stiegler's Gorge project from taking off.
"TANESCO is keen to extend its monopoly as the nation's sole power utility and wants to hijack the project from RUBADA, claiming that the authority doesn't have experience and expertise in power generation activities," said another government official.
"On the other hand, corrupt business tycoons and senior government officials who have been making billions of shillings from the country's chronic power shortages want the Stiegler's Gorge project to remain shelved forever."
Membe, who is reported to be pushing for the implementation of the project, is expected to face strong opposition from fellow government officials.
"The idea is for the government itself to build the power station through RUBADA to avoid paying the costly capacity charges and energy costs to independent power producers," said an official in the energy and minerals ministry.
"This single project could have defined Kikwete's entire legacy as president. Stiegler's Gorge could have enormously transformed Tanzania's economy and improved people's lives."
It has been suggested that the cash-strapped RUBADA should be given full powers as an executive agency reporting directly to President Kikwete or the Prime Minister's Office to implement the project.
Long-standing efforts by RUBADA to implement the project have been hit by constant delays and red tape from government ministries.
Energy companies from Canada, the United States and Russia have been keen to invest in the project, but have received a lukewarm response from senior government officials.
Apart from providing cheap and abundant electricity, the project would have opened up the southern tourism circuit and boosted irrigation farming. The proposed site of the power plant is located inside The Selous, Africa's largest game reserve. An environmental impact assessment (EIA) showed the project would not affect the wildlife at the area.
Construction of a dam would also help control flooding in the Rufiji area and create a reservoir with a total capacity of 34 billion cubic metres, which would be a permanent source of water supply to Dar es Salaam and other regions.
Only 14 percent of the 40.7 million people in Tanzania are hooked to the national power grid. President Kikwete has pledged to add just 640 MW of electricity over the next five years and increase the number of people with access to electricity to 30 percent.
"With Stiegler's Gorge, more than 50 percent of Tanzanians would have access to electricity and the country could earn billions of dollars in export revenue from the sale of electricity to neighbouring countries," said one official in the power sector.
"But some government officials don't want to hear about 2,100 MW of electricity from Stiegler's Gorge. They are interested in small, 100-megawatt power generation contracts because that's where they get their bribes from."
Source: THISDAY, December 6-12