What is meant by global water balance?
Global water balance comprises circulation of water between atmosphere, lithosphere, and hydrosphere. Water from the surface of oceans is evaporated into the atmosphere (Figure 1). This vapor is condensed by various processes, and falls as precipitation on the seas (80% of total), and the remaining 20% the lands.
What are the components of water balance?
The behavior of the components of the water balance [precipitation, potential evapotranspiration, actual evapotranspiration (E), and ΔS] were analyzed according to the Budyko model on the annual scale as a function of the aridity and evaporative indices.
What is water balance analysis?
The water balance analysis reveals the percentages of precipitation made up by surface flow, evapotranspiration, groundwater recharge and the change of soil storage, all of which are considered useful to the further understanding of the hydrological processes in the Xitiaoxi catchment.
Why do we study water balance?
The source of ‘green’ water is rainfall or ‘blue’ water has been used for irrigation. A Water Balance Analysis Can Be Used to: Assess the current status and trends in water resource availability in an area over a specific period of time.
What is water balance diagram?
A water balance chart compares the total water supplied to the site, the actual water consumed within all the water end uses in the site, and the total water leaving the site. This will help to identify areas of significant water usage and problem areas, including leaks and uncontrolled losses.
What may affect water balance?
Changes in precipitation, surface water, and land cover can affect the water balance of a given watershed and thus affect both the quantity and quality of freshwater entering the ground. Groundwater management frameworks often abstract from such interactions.
What affects the water balance?
Changes in precipitation, surface water, and land cover can affect the water balance of a given watershed and thus affect both the quantity and quality of freshwater entering the ground.
What affects water balance?
What factors affect water balance?
Determining a water balance requires looking at the following components: Total Precipitation….Flooding and Droughts
- Hydrology in Forests.
- The Hydrologic Cycle.
- Watersheds and Forests.
- Teleconnections.
- Radiative Forcing.
What is normal water balance?
In the normal resting state, input of water through ingested fluids is approximately 1200 ml/day, from ingested foods 1000 ml/day and from aerobic respiration 300 ml/day, totaling 2500 ml/day.
How does the environment affect water balance?
Various environmental factors such as temperature, humidity, radiation, and atmospheric pressure affect mainly sweating and urinary water loss, while physical exercise affects, in addition, increased respiratory water loss from the increased expiratory volume and frequency of breathing.
How is the water balance maintained in nature?
Also referred to as the hydrologic cycle, the natural water balance represents the endless recirculatory transport process that constantly moves water between the earth’s storage reservoirs – the land, the oceans and the atmosphere. Water moves constantly between the reservoirs through the following major processes.