عنوان: Droughts: Causes, Effects and Predictions
قیمت: ۶۸۰۰ تومان (۱۰ درصد تخفیف اعضاء ویژه)
There are actually four different ways that drought can be defined. Meteorological is a measure of departure of precipitation from normal. Due to climatic differences, what might be considered a drought in one location of the country may not be a drought in another location. Agricultural – refers to a situation where the amount of moisture in the soil no longer meets the needs of a particular crop. Hydrological – occurs when surface and subsurface water supplies are below normal.