Hydroelectric reservoirs bury significant amounts of organic carbon (OC) in their sediments. Many reservoirs are characterized by high sedimentation rates, low oxygen concentrations in bottom water and a high share of terrestrially derived OC, and all of these factors have been linked to a high efficiency of OC burial. However, investigations of OC burial efficiency (OCBE, i.e., the ratio betwe...

The thrust bearing, as the only part bearing axial load, is extremely important in vertical hydroelectric generating units. Its working condition directly affects safe and reliable operation of unit. However, during operation, oil film easily damaged under influence complex factors. Installation deviation a key point that can cause temperature pressure changes film, affecting force on bearing. ...

Climate change is likely to affect the generation of energy from California’s high-elevation hydropower systems. To investigate these impacts, this study formulates a linear programming model of an 11-reservoir hydroelectric system operated by the Sacramento Municipal Utility District in the Upper American River basin. Four sets of hydrologic scenarios are developed using the Variable Infiltrat...

This article compares the land use in solar energy technologies with conventional energy sources. This has been done by introducing two parameters called land transformation and land occupation. It has been shown that the land area transformed by solar energy power generation is small compared to hydroelectric power generation, and is comparable with coal and nuclear energy power generation whe...

1. Water and the Environment 1.1. The Hydrological Cycle 1.2. Surface Water and Groundwater 1.3. Aquatic Ecosystems 1.4. Water Quality and Health 1.5. Climate Variability and Water Resources 1.6. Climate Change and Water Resources 1.7. Other Threats Linked to Water Resources 2. Water and Food: Agriculture 2.1. Water Requirements 2.2. Farming with Agrochemicals 2.3. Water and Animal Production S...

In the summer of 2018, as part a joint Mongolian-Russian expedition organised by staff from Ulaanbaatar and Altai Universities, archaeological research was carried out in Egyin-gol valley (Hutag-Undur somon Bulgan aimag Mongolia). The planned work included excavation four burials Mongolian times localities Ikh Khutul Elst Khutul. This article presents results such activities detail. Particular ...