In the Mediterranean basin 60-80% of the water extracted from rivers, lakes and surface water courses is used for irrigation, and demand is currently increasing. However, the lowering of the water table, the drying-up of water courses and the increase in domestic and industrial uses have resulted in limitations for agricultural water use. In coastal plains, the lowering of the water table has led to saline water intrusion with consequence that water resource use is less sustainable as water extraction costs increase along with the quantity of the short term, we need to consider how to manage the situation in order to save the good. If this consideration is accepted, the problem is how to calculate, for the most commonly used crops and cropping systems, the fixed and variable costs of the typical farmer and define the water price according to the yield -volume curves, where yields are expressed in term of Plv. Price have to be viable for the farmer, so that crops of particular original interest with low economic returns continue to be cultivated. Clearly, water rates could vary according to such factors as crop profitability, water quality, and socio-economic conditions. Such a policy should drive users to make technical choices to save water, as briefly explained in this paper.
effect of water quantity and quality on crop yield and value.
Tedeschi A
2004
Abstract
In the Mediterranean basin 60-80% of the water extracted from rivers, lakes and surface water courses is used for irrigation, and demand is currently increasing. However, the lowering of the water table, the drying-up of water courses and the increase in domestic and industrial uses have resulted in limitations for agricultural water use. In coastal plains, the lowering of the water table has led to saline water intrusion with consequence that water resource use is less sustainable as water extraction costs increase along with the quantity of the short term, we need to consider how to manage the situation in order to save the good. If this consideration is accepted, the problem is how to calculate, for the most commonly used crops and cropping systems, the fixed and variable costs of the typical farmer and define the water price according to the yield -volume curves, where yields are expressed in term of Plv. Price have to be viable for the farmer, so that crops of particular original interest with low economic returns continue to be cultivated. Clearly, water rates could vary according to such factors as crop profitability, water quality, and socio-economic conditions. Such a policy should drive users to make technical choices to save water, as briefly explained in this paper.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.