What is an estuary? A. Which of the following is NOT a major source of freshwater pollution? When land is quarried, a large basin remains cut away from the earth. Most people have heard Earth referred to as "the water planet." A good example of a man made lake is a quarry lake. They are replenished by the rain and often by rivers and streams, too. Human and animal wastes B. Alternative waters are sustainable sources of water, not supplied from fresh surface water or groundwater, that offset the demand for freshwater. Increased Frequency of Droughts The world’s changing climate has been linked to an increased incidence of droughts that can greatly diminish freshwater supplies in a region. Another 30 percent of freshwater is in the ground. biology . Although rivers and dams are critical for water supply, they contain only 1% of the freshwater. Which Is Not A Source Of Fresh Water. Alternative water can serve as a vital water supply to federal agencies in support of water resilience by providing diverse water sources. Roads C. Farm fields D. Homes E. Factories 3. Another important source of drinking water is the surface freshwater. The water in oceans is saline and not fresh. *A. Yet, rivers and lakes are the sources of most of the water people use everyday. What does the remainder represent and what are the sources of this percentage . A. We currently use on the order of 960 cubic miles (4,000 cubic kilometers) of freshwater a year, and overall there's enough water to go around. With that name comes the rightful image of a world with plentiful water. Fresh water is naturally occurring water on Earth's surface in ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers and streams, and underground as groundwater in aquifers and underground streams. A coastal inlet where fresh and salt water meet. … A type of aquifer called an unconfined aquifer is a good source of freshwater wells but can become easily contaminated because pollutants can easily flow into the water. The rainwater ,groundwater and surface runoff are the source of freshwater. The surface water is held in lakes, rivers, dams, and streams. Unconfined aquifers are not bound by aquitards. In photographs taken from space, we can see that our planet has more water than land. Lakes are still bodies of (usually fresh) water. Fresh surface-water sources, such as rivers and lakes, only constitute about 22,300 cubic miles (93,100 cubic kilometers), which is about 1/150th of one percent of total water. 12.5% C. 50% D. 99% Subtract the answer from the last question from 100%. At the current pace, there will not be enough freshwater available to meet global energy needs by 2040. Pesticides are most likely to be found in runoff from B. Industrial wastes C. Wetlands D. Agricultural chemical in 2. Some lakes are natural lakes, forming in valleys in hilly or mountainous regions. Others are man made. What percent of water is not easily accessible or usable on earth? Which is not a source of fresh water? Confined aquifers have layers of impermeable material—aquitards—above and below. There is increasing regional scarcity, though. Read the passage. Related Questions & Answers: The Most Suitable Instrument For Measuring The Size Of An Atom Is: What Is Photolysis: What Is The Oxidation State Exhibited By Boron: Oceans and seas can act as a heat reservoir to regulate climates. .6% B. Although many people think of ponds, lakes, rivers and streams when thinking about fresh water, many scientists consider wetlands as a freshwater source.