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Irrigation is the agricultural process of applying controlled amounts of water to land to assist in the production of crops, as well as to grow landscape plants and lawns, where it may be known as watering. Agriculture that does not use irrigation but instead relies only on direct rainfall is referred to as rain-fed. Irrigation has been a central feature of agriculture for over 5,000 years and has been developed independently by many cultures across the globe.
An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials.
Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table. Groundwater is recharged from the surface; it may discharge from the surface naturally at springs and seeps, and can form oases or wetlands. Groundwater is also often withdrawn for agricultural, municipal, and industrial use by constructing and operating extraction wells. The study of the distribution and movement of groundwater is hydrogeology, also called groundwater hydrology.
The law of water balance states that the inflows to any water system or area is equal to its outflows plus change in storage during a time interval. In hydrology, a water balance equation can be used to describe the flow of water in and out of a system. A system can be one of several hydrological or water domains, such as a column of soil, a drainage basin, an irrigation area or a city. Water balance can also refer to the ways in which an organism maintains water in dry or hot conditions. It is often discussed in reference to plants or arthropods, which have a variety of water retention mechanisms, including a lipid waxy coating that has limited permeability.
The Central Arid Zone Research Institute (CAZRI) is one of the biggest research institutes of the Indian Council of Agricultural Research (ICAR), an autonomous organization working under the aegis of the Department of Agriculture Research and Education (DARE) of the Ministry of Agriculture and Farmers Welfare of Government of India. CAZRI has the distinction of being one of the first institutes in the world exclusively devoted to arid zone research and development. The institute made a humble beginning in 1952 when Government of India initiated Desert Afforestation Research Station at Jodhpur to carry out research on sand dune stabilization and for establishment of shelter belt plantations to arrest wind erosion. It was reorganized as Desert Afforestation and Soil Conservation Station in 1957 and finally in its present form Central Arid Zone Research Institute in 1959 on recommendation of the UNESCO expert, Prof. C.S. Christian of the Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia. In 1966, the institute was brought under the administrative control of Indian Council of Agricultural Research (ICAR), New Delhi.
Groundwater recharge or deep drainage or deep percolation is a hydrologic process, where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and, is often expressed as a flux to the water table surface. Groundwater recharge also encompasses water moving away from the water table farther into the saturated zone. Recharge occurs both naturally and through anthropogenic processes, where rainwater and or reclaimed water is routed to the subsurface.
Kerala Agricultural University (KAU) is the primary and the principal instrumentality of the Kerala state in providing human resources, and skills and technology, required for the sustainable development of its agriculture, defined broadly encompassing all production activities based on land and water, including crop production (agriculture), forestry and fisheries through conducting, interfacing and integrating education, research and extension in these spheres of economic endeavour. It is situated in Vellanikkara, Thrissur, Kerala. Dr. R. Chandra Babu is the Vice-Chancellor and Dr. Sakeer Husain. A is the Registrar (i/c)
Overdrafting is the process of extracting groundwater beyond the equilibrium yield of the aquifer. Groundwater is the fresh water that can be found underground; it is also one of the largest sources. Groundwater depletion can be comparable to "money in a bank", The primary cause of groundwater depletion is pumping or the excessive pulling up of groundwater from underground aquifers.
Groundwater models are computer models of groundwater flow systems, and are used by hydrologists and hydrogeologists. Groundwater models are used to simulate and predict aquifer conditions.
SahysMod is a computer program for the prediction of the salinity of soil moisture, groundwater and drainage water, the depth of the watertable, and the drain discharge in irrigated agricultural lands, using different hydrogeologic and aquifer conditions, varying water management options, including the use of ground water for irrigation, and several crop rotation schedules, whereby the spatial variations are accounted for through a network of polygons.
SaltMod is computer program for the prediction of the salinity of soil moisture, groundwater and drainage water, the depth of the watertable, and the drain discharge (hydrology) in irrigated agricultural lands, using different (geo)hydrologic conditions, varying water management options, including the use of ground water for irrigation, and several cropping rotation schedules. The water management options include irrigation, drainage, and the use of subsurface drainage water from pipe drains, ditches or wells for irrigation.
Water resources are natural resources of water that are potentially useful as a source of water supply. 97% of the water on the Earth is salt water and only three percent is fresh water; slightly over two thirds of this is frozen in glaciers and polar ice caps. The remaining unfrozen freshwater is found mainly as groundwater, with only a small fraction present above ground or in the air. Natural sources of fresh water include surface water, under river flow, groundwater and frozen water. Artificial sources of fresh water can include treated wastewater and desalinated seawater.
Agricultural hydrology is the study of water balance components intervening in agricultural water management, especially in irrigation and drainage.
The environmental effects of irrigation relate to the changes in quantity and quality of soil and water as a result of irrigation and the subsequent effects on natural and social conditions in river basins and downstream of an irrigation scheme. The effects stem from the altered hydrological conditions caused by the installation and operation of the irrigation scheme.
Krishi Vigyan Kendra Kannur is a front-line agricultural extension center and one of the 700 KVKs financed by the Indian Council of Agricultural Research (ICAR). It opened on 30 March 2004 on the premises of Pepper Research Station, Panniyur under Kerala Agricultural University. KVK primarily works to influence the other extension systems of the district, caters to the training needs of the farmers and extension functionaries, and facilitates the spread of technologies tailored to the diverse environment of farmers.
Irrigation in Iran covers 89,930 km2 making it the fifth ranked country in terms of irrigated area.
Water storage is a broad term referring to storage of both potable water for consumption, and non potable water for use in agriculture. In both developing countries and some developed countries found in tropical climates, there is a need to store potable drinking water during the dry season. In agriculture water storage, water is stored for later use in natural water sources, such as groundwater aquifers, soil water, natural wetlands, and small artificial ponds, tanks and reservoirs behind major dams. Storing water invites a host of potential issues regardless of that waters intended purpose, including contamination through organic and inorganic means.
The Government of India (GoI) constituted a common tribunal on 10 April 1969 to solve the river water utilization disputes about the river basin states of Godavari and Krishna rivers under the provisions of Interstate River Water Disputes Act – 1956. The common tribunal was headed by Sri RS Bachawat as its chairman with Sri DM Bhandari and Sri DM Sen as its members. Godavari river basin spreads through the states of Telangana (TS), Maharashtra (MR), Orissa, old Madhya Pradesh {later bifurcated into present Madhya Pradesh (MP) and Chhattisgarh}, Karnataka (K) and Andhra Pradesh (AP). Krishna river basin states Maharashtra, Karnataka and Andhra Pradesh insisted on the quicker verdict as it had become more expedient for the construction of irrigation projects in Krishna basin. So the of Godavari Water Disputes Tribunal (GWDT) could not proceed till the Krishna Water Disputes Tribunal final verdict was submitted to GoI on 27 May 1976.
Van Vigyan Kendra (VVK) or Forest Science Centres (FSC) has been established by Indian Council of Forestry Research and Education (ICFRE) of the Ministry of Environment and Forests, Govt. of India. It intends to help disseminate various technologies developed by farmers, forest based industries and forest research institutes.
A Krishi Vigyan Kendra (KVK) is an agricultural extension center in India. The name means "farm science center". Usually associated with a local agricultural university, these centers serve as the ultimate link between the Indian Council of Agricultural Research and farmers, and aim to apply agricultural research in a practical, localized setting. All KVKs fall under the jurisdiction of one of the 11 Agricultural Technology Application Research Institutes (ATARIs) throughout India.