Water Conservation and Management

The cohesion-tension-transpiration pull model is the widely accepted theory explaining how water is pulled up through the xylem to the tops of tall trees.

Groundwater is water that occupies the pore spaces and fractures in underground rock formations known as aquifers.

Aquifers are geological formations that are permeable enough to store and transmit water; thus, the terms are effectively describing the same storage mechanism.

Overdrawing groundwater reduces the water table, which can cause the ground to settle (subsidence), form sinkholes, and deplete the aquifer itself.

Infiltration is the process by which water on the ground surface enters the soil. This water percolates downward to recharge groundwater supplies in aquifers.

Soil erosion occurs when soil is washed away by water or blown away by wind.

Irrigation is the agricultural process of applying controlled amounts of water to land to assist in the production of crops. It is essential for farming in dry regions.

While the Earth is covered in water, only about 2.5% to 3% is fresh water, and of that, only a very small fraction (often cited as around 1%) is easily accessible for human use in rivers, lakes, and accessible groundwater.

A watershed is an area of land that channels rainfall and snowmelt to creeks, streams, and rivers, and eventually to outflow points such as reservoirs, bays, and the ocean.

An aquifer is an underground layer of water-bearing permeable rock or gravel from which groundwater can be extracted. Rivers and streams are surface water features.

Flood irrigation is the least efficient method, losing significant water to evaporation and runoff. This excess water can cause soil salinization as dissolved salts accumulate when water evaporates from the soil surface. Drip and trickle irrigation are far more efficient, and center pivot is intermediate in efficiency.

Dams are constructed to control water flow and store excess water, which helps in preventing floods in downstream areas.

Nature reserves are protected areas that can be managed to facilitate rainwater collection and groundwater recharge, making them suitable catchment areas.