Desiccation of the Sahara since the middle Holocene has eradicated all but a few natural archives recording its transition from a "green Sahara" to the present hyperarid desert.

The generally warm and ice-free conditions of the Eocene epoch rapidly declined to the cold and glaciated state of the Oligocene epoch. Geochemical evidence from deep-sea sediments resolves in detail the climatic events surrounding this transition.

Watershed management is critical to sustain the benefits from the development of small water storages or small dams in Barani Areas, said Asian Development Bank's experts. In a project review report on "Watershed Management Constraints in Barani Areas", Sedimentation Surveys of sample dams in the Pothowar region reveal that loss in water storage capacity can be as high as 4.2 percent per year, which could lead to full siltation of the dam's dead storage after 24 years.

Until recently, most assumed that the American West was a natural dust bowl where every cowboy breathed true grit. Now it seems that the dust was mostly man-made and came with the cows. Head 'em up, move 'em out - and choke on the dust. Before the cows and the cattle trails immortalised in TV series such as Rawhide, there was no dust. It could even explain some of the changes in the region now blamed on global warming.

The present study evaluated the options of silt disposal from Beas Satluj Link (BSL) hydroelectric project in Himachal Pradesh in India. BSL project is basically a run of the river power project, envisages diversion of about 4700 MCM per annum of Beas river water into Satlej river falling through an elevation difference at about 320 m.

The geochemical investigation of sediments deposited in the Renuka Lake basin and its adjoining wetland has shown variation in the distribution and concentration of major, trace and REEs.

Coastal areas are potential zones of marine resources for a country like India which has a long stretch of coast line. Coastal ecosystem has vast and rich biodiversity consisting of the wetlands along the coastal region, the fish resources available in the sea, coral reefs etc.

Coastal areas are potential zones of marine resources for a country like India which has a long stretch of coast line. Coastal ecosystem has vast and rich biodiversity consisting of the wetlands along the coastal region, the fish resources available in the sea, coral reefs etc.

Following the success of watershed development operation research project Sukhomajri in Haryana, large number of water harvesting dams were constructed in the Shivaliks region of north India. The reservoirs of a number of these earthen dams got silted due to fragile geological strata, inadequate vegetation cover in the catchment areas, continued biotic interference and lack of community participation in building social pressure against grazing and illicit felling.

After collecting water from a natural waterbody, the raw water undergoes sedimentation. During sedimentation, some particles spontaneously settle down. For particles slow to settle, chemicals

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