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Bangladesh faces a major challenge in supplying safe potable water to the most of her 160 million people. The drinking water in Ba ngladesh is largely sourced from hand- pump tubewells, which draw drinking water from shallow aquifer, which has been badly polluted with Arsenic in recent years. Although various methods have been proposed to solve this problem, an acceptable and sustainabl e solution is yet to be achieved. As an alternative, rainwater can be harvested and used to secure the safe potable water for Ban...

Ground water, according to higher reliance coefficient and less fluctuations, has been used for many years. Precipitation is a major supplier of underground water resources and aquifers. So any changes in rainfall amount fluctuate underground water table depth. Occurrence of drought is the most important reason for the decrease of water table. To analyze the role of drought on underground water in Shahrekord plain rainfall and water table level were used during 1984-2008 period. The resualts shows a strong correla...

The effect of biodiversity on ecosystem func tion is complex and requires understanding of all interacting systems, such as hydr ology, geology and above ground plant diversity of the study area. In this study hydrogeoch emical modeling using PHREEQC was used to investigate the effect external fact ors (nearby river Saale and an underground channel) on the groundwater chemistry of a large grassland diversity experiment (Jena experiment). Groundwater chemical analys is was performed for river Saale and groundwater ...

There are many problems related to pipe network rehabilitation, the main one being how to provide an increase in the hydraulic capacity of a system. Most of the Slovak irrigation pipe networks are branched, which is case elsewhere. A possible approach to increasing the hydraulic capacity of such system s is to convert them to looped networks (thereby providing alternative pathways) and increase their hydraulic capacity with minimum capital investment. In this work authors deal with application of simulation and op...

This paperwork makes an assessment of risk failure in defense works against flood located along and perpendicular on rivers , including natural riparian wetlands. Highlighting these areas allow us to ma ke complex studies about the different possibilities of flood mitigation, considering the surfaces and lowering the flood risk. Explanations about the “hazard - risk” scheme are made, with flood analyses in many case studies to propose a computation mode l for risk and management assessment accordingly with the...

In the article is shown the approach to a research on hydropower resources in Western Siberia. The hydropower potential estimates are ba sed on the following factors: water content of rivers, river slopes and flow velocities. Identified are the portions of rivers with largest energ Сѓ capacity and the possibility to use hydro potential. A measure of hydrological tension was cal culated, which takes in to account the quantitative characteristics of following factors: low water, ice effect s, high water, sediments r...