The first dam for which reliable records exist was built on the Nile River sometime before 4000B.C.E.near the ancient city of Memphis. Remains of other historic dams have been located at numerous sites bordering
For many communities here, sand dams built on seasonal rivers have grown in popularity. Article content That’s true for Kyalika village in Makueni County, where Rhoda Peter and her welfare group have built three sand dams along a nearby river. When The Associated ...
To begin with, dams generally are situated across rivers within a limited footprint, whereas levees run along river systems for extended lengths, sometimes for hundreds of miles. Dams typically hold back reservoir water every day of every year, whereas levees generally are only part-time workers ...
Chapter 6 Dams: Ecological Impacts and Management Stefan Schmutz and Otto Moog 6.1 Introduction Dam construction goes back in human history for more than 5000 years (e.g., Sadd el-Kafara dam in Egypt for flood protection), but most of the world's existing dams have been built after the ...
Survey results in South Australia find most hazardous farm dams studied are not built or maintained to an adequate standard and spillways are blocked and/or under-designed. This results in potentially storing more water than entitled and creating unsafe dams and potential water sharing equity and ...
The report focuses on Laos, which in years past has proclaimed itself the future “Battery of Southeast Asia,” by aggressively developing hydropower dams on the Mekong. Laos has already built 29 large dams along the river’s mainstream and tributaries, with plans for over 100 in total. The ...
Earth dams can be built with local materials, and they are highly adaptable to deformation. They also entail a short construction period and low costs. Thus, these structures are widely used in hydropower development in this region. The unfavorable geology of overburden layers that are tens or ...
Chapter 6 Dams: Ecological Impacts and Management Stefan Schmutz and Otto Moog 6.1 Introduction Dam construction goes back in human history for more than 5000 years (e.g., Sadd el-Kafara dam in Egypt for flood protection), but most of the world's existing dams have been built after the ...
Moreover, built-up areas and water bodies were designated as restricted areas due to environmental and safety concerns [47,52,121]. The suitability index maps indicate that suitability for water harvesting sites increases when moving from the border of the watershed toward the center. This is ...
Many devices have been designed and built to assist fish in overcoming dams. Often, these devices have been culverts, flumes or sluices with internal baffles. Typically, the culvert is tipped at an angle to match the upward grade change in the waterway, and water flows down through the culv...