10.3 –SOURCES OF FRESH WATER PG.376. Three Sources of Fresh Water. This happens through evaporation. Freshwater on the land surface is a vital part of the water cycle for everyday human life. Most of the water people use everyday comes from these sources of water on the land surface. Another 30 percent of freshwater is in the ground. The water in this lake is considered to be the cleanest lake water as it contains a very low percentage of dissolved and suspended mineral substances, but a lot of oxygen. On the landscape, freshwater is stored in rivers, lakes, reservoirs, and creeks and streams. Harvesting or collecting rain water is a technology that … The major sources of freshwater are rivers and lakes. OBJECTIVES •Describe why run-off is important for rivers •Describe how a small stream becomes a large river •What is a drainage basin •Describe the important and generation of an underground aquifer •Describe the two different types of … 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. Glaciers are the largest sources of fresh water, and they store an estimated 75% of the earth’s fresh water. Although it is a renewable resource because of the hydrological cycle, the store of freshwater on earth is not infinite. Fresh water resources in numbers - Europe. Yet, rivers and lakes are the sources of most of the water people use everyday. By 2005 for Europe as a whole (including New Member States and Accession Countries) some 38% of the abstracted water was used for agricultural purposes, while domestic uses, industry and energy production account for 18%, 11%, and 33%, respectively (2). The water in this lake is considered to be the cleanest lake water as it contains a very low percentage of dissolved and suspended mineral substances, but a lot of oxygen. Others are man made. Some lakes are natural lakes, forming in valleys in hilly or mountainous regions. During the water cycle contaminated water slowly becomes fresh. When land is quarried, a large basin remains cut away from the earth. Rain Rain is a common source of water and is highly important for survival of all life. A good example of a man made lake is a quarry lake. Rivers and lakes, the primary sources of freshwater, have run dry in many parts of the world. The major sources of freshwater are rivers and lakes. They are replenished by the rain and often by rivers and streams, too. The largest lake reservoir is lake Baikal, which contains 20 thousand km3 of water. The largest lake reservoir is lake Baikal, which contains 20 thousand km3 of water. Even with the large quantities of useful fresh water contained in glaciers and ice caps, they are rarely used as water sources due to the high amount of funds needed to melt the thick ice and transport the water to residential areas. Lakes are still bodies of (usually fresh) water.