Sentences with phrase «small dams»

"Small dams" refers to smaller-sized structures built across rivers or streams to store water in a reservoir. These dams are designed to collect and retain water for various purposes like irrigation, power generation, or water supply for local communities. Their size makes them different from larger dams, which are typically massive structures built for similar purposes on larger water bodies. Full definition
The researchers say more research is needed to understand the cumulative effects of many small dams on the landscape, especially given the rapid pace of development.
There are tens of thousands of additional small dams that fall through the cracks of our national inventory.
Building small dams in small places doesn't help you with that.»
The grower can control the spread of water in sloping gardens with small dams made from soil or sections of two - by - fours.
With the «green» reputation of large hydroelectric dams already in question, scientists are reporting that millions of smaller dams on rivers around the world make an important contribution to the greenhouse gases linked to global climate change.
Today, there is also a growing interest in small hydro facilities such as small dams that generate less than 10 megawatts of power and pumped storage hydroelectric plants.
Although large dams are generally considered more harmful than their smaller counterparts, the research team's surveys of habitat loss and damage at several dam sites on the Nu River and its tributaries in Yunnan Province revealed that, watt - for - watt, the environmental harm from small dams was often greater — sometimes by several orders of magnitude — than from large dams.
Their study, showing that more methane than previously believed bubbles out of the water behind small dams, appears in ACS» journal Environmental Science & Technology.
These might include small dams in the headlands or working with farmers to build embankments around fields to store water during the winter months when cattle are housed indoors.»
Dam realities: Scientists in the Division of Biology explore how small dams in Kansas streams disrupt native fishes
Once the Banqiao and Shimantan Dams were completed many, many smaller dams were built.
For every large hydroelectric dam, 10 small dams exist.
As streams, rivers and watersheds absorb more small dams, however, surprisingly few scientific studies have considered their environmental impact, and policies or regulations are lacking or largely inconsistent.
«While the number of small hydropower dams in operation or planned for tributaries to the Nu River is unreported,» the authors note in this study, «our field surveys indicate that nearly one hundred small dams currently exist within Nujiang Prefecture alone.»
The trend toward small dams began in Europe in the mid-1980s and has grown rapidly in recent decades.
The lack of regulation paired with a dearth of communication between small dam projects in China allows for the impacts to multiply and accumulate through several dam sites, the study authors write.
In surveying Kansas» streams and rivers, the researchers discovered numerous small dams that do not allow enough habitat for the fish to complete their reproductive cycles.
Our latest came from a big sire at 28 ″ and a very small dam, maybe 20 ″.
The duplex overlooks a pretty small dam, popular with weavers and water birds and is close to the Club house...
«There is a proliferation of small dams and not much known about how multiple dams affect watersheds as a whole, so that's where science has a key role to play.»
A couple years ago we covered the proposed Xayaburi dam on the Mekong River in Laos, to be located north of the capital Vientiane — specifically how the mega dam could disrupt the Mekong ecosystem, and how smaller dams on tributaries of the river could produce more power with lower environmental impact.
While in the Peace Corp, Rich helped dozens of villages, in Sakolnakorn Province, design and build infrastructure projects such as small dams and spillways.
Maeck's team decided to take a look at methane releases from the water impoundments behind smaller dams that store water less than 50 feet deep.
Michal Kravcik was awarded the Goldman Prize in 1999 for his work to halt the construction of destructive dam projects in post-communist Slovakia by proposing democratic alternatives, including smaller dams,... Read More
President Akufo - Addo says the government will commence processes to construct 192 small dams in various selected districts of the country from 2018.
Iranian hackers infiltrated the computer system at a small dam in a quiet village 20 miles from New York City in 2013, according to a report on Monday.
Initially the smaller dams were built in the mountains, but in 1958 Vice Premier Tan Zhenlin decreed that the dam building should be extended into the plains of China.
Luckily, I have formed a small dam of napkins around my chin so I can finish typing without the incessant dripping sounds.
«I can report that 320 small dams and dugout sites in 64 districts, in the northern part of the country, have been earmarked for development,» he said / He added:» Additionally, 192 will be evaluated in 2018 for development there.»
To facilitate the provision of community - owned and managed small - scale irrigation facilities especially in northern Ghana, the Ministry identified 192 small dams and dugouts in 64 districts for development under the «One - Village - One Dam» initiative beginning 2018.
He said the number is part of the total of 320 small dams and dug - outs planned to be constructed in 64 districts in northern Ghana as part of the government's One - District - One - Dam project.
«I can report that 320 small dams and dugout sites in 64 districts, in the northern part of the country, have been earmarked for development.
Iranian hackers infiltrated the control system of a small dam less than 20 miles from New York City two years ago, sparking concerns that reached to the White House, according to former and current U.S. officials and experts familiar with the previously undisclosed incident.
The president, Nana Akufo - Addo who gave the keynote address at the 33rd Farmers» Day celebration in Kumasi on December 1, 2017 said that in line with the government's target of promoting all - year - round cropping, 320 small dams and dugout in 64 districts in the Northern Region have been earmarked to be developed under the One - Village - One - Dam project.
Farms and cities siphon most of the river's water before it reaches Mexico, but on March 23, under a binational agreement, U.S. and Mexican officials unleashed an eight - week «pulse flow» from a small dam on the border to help restore the delta.
And efforts to emulate Da Yu — smaller dams have proliferated in the upper reaches of the river — may yet prove the undoing of the mightiest of man - made waterworks.
To compare the impacts of small and large dams, Kibler investigated 31 small dams built on tributaries of China's Nu River and four large dams proposed for the main stem of the Nu River.
After evaluating data from the field, hydrological models, and Environmental Impact Assessment reports about the small dams, Kibler and Tullos concluded that impacts of the small dams exceeded those of large dams on nine of the 14 characteristics they studied.
A fresh look at the environmental impacts of dams on an ecologically diverse and partially protected river in China found that small dams can pose a greater threat to ecosystems and natural landscapes than large dams.
Some small dams are built to store water in reservoirs and then release water downstream, while others divert water away from rivers into powerhouses; in all cases water is used to turn turbines and create electricity.
In order to mitigate the detrimental effects of small dams, there is a «need for comprehensive planning of low - impact energy development.»
But, «small dams have hidden detrimental effects, particularly when effects accumulate» through multiple dam sites, said Kelly Kibler, a water resources engineer who led this study as part of her PhD research while at Oregon State University in Corvallis.
For example, many of the small dams investigated in the new study were supported by the Kyoto Protocol, a 1997 agreement to reduce greenhouse gas emissions.
One particularly detrimental impact of the small dams observed in this study is that they often divert the flow of the river to hydropower stations, leaving several kilometers of river bed dewatered, Kibler explained.
«Small dams on Chinese river harm environment more than expected, study finds.»
Small dams are ideal for rural areas because they don't have to be connected to the electric grid to power homes and businesses.
Small dams in China «often lack sufficient enforcement of environmental regulations» because they are «left to the jurisdiction of the province,» said Guy Ziv, lead scientist for the Natural Capital Project, an organization which develops tools to assess and quantify natural resources, and a researcher for the Woods Institute for the Environment at Stanford University.
These factors have been long - studied for large dams, yet have been largely ignored for small dams — especially considering the potential cumulative effects of many small dams in a single river system.
Among the fixes, the report recommends considering tearing out dozens of small dams, temporarily closing a fish hatchery, restoring wetlands, altering logging practices, and refilling long - drained lakes.
They describe analysis of methane release from water impounded behind six small dams on a European river.
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