Rainwater Harvesting

This presentation by ACWADAM on earth sciences in watershed management shows how the occurrence of water within a watershed is governed by the rock types occurring both at the surface and within the subsurface, their sequence and their structure. The presentation deals with the basic components involved in the mapping of a watershed –

• The type of rocks (lithology), and
• The structure (whether these are folded, faulted, fractured, jointed etc.,)

This presentation by ACWADAM deals with the structure of the sub-surface. The lithology and structure of rocks together define the geometric framework for the movement of groundwater. To some extent, these factors also govern the movement of surface water too. In other words, the physical environment of rocks and rock material hosts water, and hence, controls its accumulation and flow in the watershed.

This presentation by ACWADAM deals with hydrologic properties of the rock framework in which groundwater occurs and through which it moves. In watershed programmes, it is necessary to develop a correct understanding of the storage and transmission of water within such channels because the shape of openings in a rock or sediment, their size, volume and interconnection play a vital part in the hydraulic characteristics of an aquifer.

Content and Image Courtesy: Hindustan Unilever Limited (HUL)

United Nations reports that people need a minimum of 50 litres of water a day for drinking and other basic needs. In India, more than 50% of the population lives on less than 10 liters of water a day. Approximately 70% of the total water is consumed by the agriculture sector. India is an agri-economy, and as its population grows, there will be an increase in water consumption by the agriculture sector. These issues are likely to be exacerbated by climate change, making access to water an issue for farmers and society.

This presentation by ACWADAM deals with weather, the most fundamental process that shapes the earth. Meteorology, the science of studying weather, is described where some predictions can be made using atmospheric conditions or some data can be generated using simple equipments. These can in turn be used for measurement of weather for better implementation of a watershed project.

 One of the most serious issues of water management is the question how to allocate the water resources to guarantee sufficient amount of water for all demands. That is why, it can be expected that allocation management will gain further importance in the future. It is not exaggerated to declare that “the issue of allocation overshadows all other aspects of water management”.