Dam Safety · DRP News Bulletin

DRP News Bulletin 2 April 2018: How New Rivers are born in Argentina

New Rivers appearing in Morro Basin in Argentina This is unheard of, amazing story, a frightening and yet fascinating one, of how large scale deforestation, combined with wet cycle and fragile top soil has lead to NEW RIVERS suddenly appearing in Morro Basin in Argentina over the last decade. The deforestation has been mostly done for brining the land under Soya Beans, the biggest contributor to exports from Argentina, Argentina is the world’s third largest producer after US and Brazil, 60% of its arable land under this single crop. So much so that commentators have called the new river as Soya Bean river and Argentina as Soya Bean republic, in line with Banana republic. Some 2.4m hectares of native forest have been lost in the last 10 years, according to Greenpeace. Continue reading “DRP News Bulletin 2 April 2018: How New Rivers are born in Argentina”

Dam Safety

Oroville Dam damage in US: Many questions

USA’s tallest, Oroville Dam on Feather river in California suffered severe spillway damage, as discovered on Feb 7, 2017. As we wrote in our blog “Oroville Dam Spillway Damage in USA: Worst is yet to come”[i] on Feb 12, 2017, worse was yet to come, but the author did not imagine the threat would materialize so soon. Here we try to capture the key events since that blog. Continue reading “Oroville Dam damage in US: Many questions”

Dam Safety

Oroville Dam Spillway Damage in USA: Worst is yet to come

Oroville Dam, the tallest Dam in USA was found to have suffered severe damage to its spillway on Feb 7, 2017. A crater of about 180 feet width, 250 feet length and 30 feet depth was found in lower portion of the 3000 ft long spillway on Tuesday when 55000 cusecs (cubic feet of water) was flowing down the spillway.

That water release down the damaged spillway was stopped the same day. But the water level in the Oroville dam was than already over 80%, fast climbing to over 90% by the evening of Feb 9, 2017 and with inflow of 128000 cusecs on Feb 7, rising to 191000 cusecs on Feb 9, the officials of Department of Water Resources (DWR) of California decided to first test the damaged spillway by releasing 20000 cusecs twice on Feb 8, 2017. This further damaged the spillway, increasing the depth of the crater to upto 300 ft as per some reports and not only increasing the length and width, but also eroding the adjoining hills. Continue reading “Oroville Dam Spillway Damage in USA: Worst is yet to come”