Groundwater is recharged naturally by rain & snow melt & to a smaller extent by surface water (rivers & lakes). Recharge may be impeded somewhat by human activities including paving, development, or logging. These activities can result in enhanced surface runoff & reduction in recharge. Use of groundwater, especially for irrigation, may also lower the water tables. Groundwater recharge is an important process for sustainable groundwater management, since the volume-rate abstracted from an aquifer in the long term should be less than or equal to the volume-rate that is recharged.
Artificial groundwater recharge is becoming increasingly important in India, where over-pumping of groundwater by farmers has led to underground resources becoming depleted. Recharge can help move excess salts that accumulate in the root zone to deeper soil layers, or into the groundwater system. Another environmental issue is the disposal of waste through the water flux such as dairy farms, industrial, & urban runoff.
As far as preservation of environment is concerned, it tries to maintain the present condition areas of the nature or Earth which are not yet touched by humans. This is because of the fat that mankind is encroaching onto the environment at such a rate that various wild l&scapes are being given over to farming, industry, housing, tourism & other human developments. & we lose much of the natural areas. Preservationists also strongly support the protection of nature for purely human-centered reasons. However, some adopts less human-centered approach to environmental protection, placing a value on nature that does not relate to the needs & interests of human beings. But is a fact that by preserving & conserving environment we can make a healthy atmosphere to live in.