Vapour-pressure deficit temperature, the relative humidity and, if possible, the canopy air temperature. We must then compute the saturation pressure. Saturation pressure can be looked up in a psychrometric chart or derived from the Arrhenius equation, a way to compute it directly from temperature is where: To convert between Rankine and degrees Fahrenheit: formula_10 We compute this pressure for both the ambient and canopy temperatures. We then can compute the actual partial pressure of the water vapour in the air by multiplying by the relative humidity [%]: and finally VPD using formula_12 or formula_13 when the canopy temperature is known. Vapour-pressure deficit
Sharing the water of the Ganges that India is drawing excessive water and the amount allocated to Bangladesh is unjust and insufficient. India in turn complains that the water allocated to Bangladesh leaves it with less water than necessary for the functioning of the Kolkata Port and the National Thermal Power Corporation in Farakka. Other critics have also stressed environmental reasons for India to reconsider its drawing of water at Farraka. Alarming increases in deforestation and erosion at the upper levels of the Ganges river increases the deposition of silt at the lower level, which is already measured at 2 million tonnes annually, along with increased