Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. 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 Groundwater is also often withdrawn for agricultural, municipal, and industrial use by constructing and operating extraction wells.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.
Fishery can mean either the enterprise of raising or harvesting fish and other aquatic life; or more commonly, the site where such enterprise takes place. Commercial fisheries include wild fisheries and fish farms, both in freshwater waterbodies and the oceans. About 500 million people worldwide are economically dependent on fisheries. 171 million tonnes of fish were produced in 2016, but overfishing is an increasing problem — causing declines in some populations.
The terms international waters or transboundary waters apply where any of the following types of bodies of water transcend international boundaries: oceans, large marine ecosystems, enclosed or semi-enclosed regional seas and estuaries, rivers, lakes, groundwater systems (aquifers), and wetlands.
The Salton Sea is a shallow, landlocked, highly saline body of water in Riverside and Imperial counties at the southern end of the U.S. state of California. It lies on the San Andreas Fault within the Salton Trough, which stretches to the Gulf of California in Mexico.
Peter H. Gleick is an American scientist working on issues related to the environment. He works at the Pacific Institute in Oakland, California, which he co-founded in 1987. In 2003 he was awarded a MacArthur Fellowship for his work on water resources. Among the issues he has addressed are conflicts over water resources, water and climate change, development, and human health.
Marine conservation, also known as ocean conservation, is the protection and preservation of ecosystems in oceans and seas through planned management in order to prevent the over-exploitation of these marine resources. Marine conservation is informed by the study of marine plants and animal resources and ecosystem functions and is driven by response to the manifested negative effects seen in the environment such as species loss, habitat degradation and changes in ecosystem functions and focuses on limiting human-caused damage to marine ecosystems, restoring damaged marine ecosystems, and preserving vulnerable species and ecosystems of the marine life. Marine conservation is a relatively new discipline which has developed as a response to biological issues such as extinction and marine habitats change.
Environmental security examines threats posed by environmental events and trends to individuals, communities or nations. It may focus on the impact of human conflict and international relations on the environment, or on how environmental problems cross state borders.
The Earth Institute is a research institute at Columbia University that was established in 1995. Its stated mission is to address complex issues facing the planet and its inhabitants, with a focus on sustainable development. With an interdisciplinary approach, this includes research in climate change, geology, global health, economics, management, agriculture, ecosystems, urbanization, energy, hazards, and water. The Earth Institute's activities are guided by the idea that science and technological tools that already exist could be applied to greatly improve conditions for the world's poor, while preserving the natural systems that support life on Earth.
Environmental terrorism consists of one or more unlawful or even hostile actions that harm or destroy environmental resources or deprive others of their use. It is different to environmental vandalism, which is a rather permitted but ethically disputed destruction of environment. More colloquially, the phrase is also used to label actions seen as the unnecessary or unjustified destruction of the environment for personal or corporate gain.
The Global Water Partnership (GWP) is an international network created to foster an integrated approach to water resources management (IWRM) and provide practical advice for sustainably managing water resources. It operates as a network, open to all organisations, including government institutions, agencies of the United Nations, bi- and multi-lateral development banks, professional associations, research institutions, non-governmental organisations, and the private sector.
Peak water is a concept that underlines the growing constraints on the availability, quality, and use of freshwater resources. Peak water was defined in 2010 by Peter Gleick and Meena Palaniappan. They distinguish between peak renewable, peak non-renewable, and peak ecological water to demonstrate the fact that although there is a vast amount of water on the planet, sustainably managed water is becoming scarce.
Water resources are natural resources of water that are potentially useful for humans, for example as a source of drinking water supply or irrigation water. 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. Human uses of water resources include agricultural, industrial, household, recreational and environmental activities.
There is a long and established framework for water resources management in Colombia. The Environment Ministry and up to 33 Regional Authorities, are in charge of water resources management and policies at the national and regional and watershed level, respectively. Other sectoral ministries are in charge of water demand for energy, water supply and sanitation and water for irrigation.
A society with a high level of water security makes the most of water's benefits for humans and ecosystems, and limits the risk of destructive impacts associated with water. The risks include too much water (flood), too little water or poor quality (polluted) water. A more detailed definition of water security is: "the reliable availability of an acceptable quantity and quality of water for health, livelihoods and production, coupled with an acceptable level of water-related risks". Access to WASH services is one component of achieving water security. Some organizations use the term water security more narrowly for water supply aspects only.
Partnerships in Environmental Management for the Seas of East Asia (PEMSEA) is a regional partnership programme implemented by the United Nations Development Programme (UNDP) and executed by the United Nations Office for Project Services (UNOPS). The project, started in 1994, was originally known as Prevention and Management of Marine Pollution in the East Asian Seas (SDS-SEA).
The Arctic policy of the United States is the foreign policy of the United States in regard to the Arctic region. In addition, the United States' domestic policy toward Alaska is part of its Arctic policy.
Water resource policy, sometimes called water resource management or water management, encompasses the policy-making processes and legislation that affect the collection, preparation, use, disposal, and protection of water resources. Water is a necessity for all forms of life as well as industries on which humans are reliant, like technology development and agriculture. This global need for clean water access necessitates water resource policy to determine the means of supplying and protecting water resources. Water resource policy varies by region and is dependent on water availability or scarcity, the condition of aquatic systems, and regional needs for water. Since water basins do not align with national borders, water resource policy is also determined by international agreements, also known as hydropolitics. Water quality protection also falls under the umbrella of water resource policy; laws protecting the chemistry, biology, and ecology of aquatic systems by reducing and eliminating pollution, regulating its usage, and improving the quality are considered water resource policy. When developing water resource policies, many different stakeholders, environmental variables, and considerations have to be taken to ensure the health of people and ecosystems are maintained or improved. Finally, ocean zoning, coastal, and environmental resource management are also encompassed by water resource management, like in the instance of offshore wind land leasing.
Caroline King-Okumu is an international development opportunities manager for the UK Centre for Ecology and Hydrology. She was formerly a senior researcher for the International Institute for Environment and Development (IIED). Her major areas of research are dryland ecosystems, economic and environmental assessment, and climate change. She is considered an international expert on land and water management, particularly drylands agriculture. King-Okumu is based in Kenya but is involved in research and projects throughout the world.
The United Nations University Institute for Water, Environment and Health (UNU-INWEH) is a United Nations (UN) agency responsible for acting as the UN’s "Think Tank on Water". The organization is a research and training institute of the United Nations University (UNU), the academic arm of the United Nations, with a mandate to address water security and access issues internationally. UNU-INWEH was created in 1996 in response to an emerging concern about the growing global water crisis and its harmful impact on human and environmental health and sustainable development.
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