In this equation, ηcu represents consumptive use efficiency, Cu represents consumptive use of water, while Wp represents the volume of water depleted from the plant root zone. Type 4 - Consumptive use Efficiency (ηcu)Ĭonsumptive use efficiency is determined by comparing the water consumed against the water that is depleted from the crop root zone. In this equation, ηu stands for water use efficiency, Wu stands for the amount of water used, and Wl stands for the amount of water applied to the land. Water use efficiency refers to the volume of water that is used versus the amount of water that is applied. In this equation represents water application efficiency, Wz represents the amount of water stored in the crop root zone, and Wl represents the amount of water that is applied to land. Water application Efficiency is a measurement of the amount of water that is stored in plant root systems compared to the volume of water that is applied to the land. Type 2 - Water Application Efficiency (ηa) In this equation, ηc is water conveyance efficiency, Wl is the volume of water applied to the land, and Wr is the volume of water taken from the reservoir. It is calculated using the following equation: Water conveyance efficiency refers to the volume of water that is applied to the land and the amount of water that is taken from the source – typically a reservoir. There are four different kinds of irrigation efficiency: Type 1 - Water Conveyance Efficiency (ηc) Types of Irrigation Efficiency and Calculation Formulas Irrigation efficiency refers to the ratio of water used versus not used for crop growth due to various reasons. If we are to make the most of limited water resources, we must embrace the concept of irrigation efficiency and seek ways of maximising it before it is too late. Unfortunately, while it suits their financial challenges, it is the most wasteful way of irrigating crops.Īccording to the website, in Asia, which contains 62% of the world’s irrigated land, only 7% of the land uses micro-irrigation technology. They rely on inefficient irrigation techniques such as flood and surface irrigation. In the Great Plains of California, USA, farmers have used over 30% of the water in the Ogallala aquifer, one of the aquifers which took over 20,000 years to form, while on the Arabian peninsula, farmers have drained most of the aquifers in the region over a period of 40 years of unregulated irrigation.įarmers in areas like the Arabian Peninsula are not wealthy and cannot afford sophisticated irrigation technology. The mission concluded that of the 37 of the Earth’s major aquifers, 21 were on the brink of collapse. During that mission, the research team discovered that the majority of significant sites losing water were situated below ground. In 2002 NASA began a mission whose primary task was to study ice sheet depletion.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |