عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Kashf roud basin is a section of qara – quran basin which is located in the northeast of
khorasan. Water balance and climatic type of this basin are to be analysed on the basis
of hydroclimatic elements wite regard to water defesit in khorasan, research in the
balance of water of the region becomes of great significance for the correct use of land
and use of surface as well as ground water resources of the region.
The present research aims at
(1) the balance of climatic waters of the said baisin; and
(2) at indentificatoin of climatic types of the area under in vestigation.
Analysis of the water balance of the kashf roud basin demonstrates that alongside the
reducation of rainfall evaporation strongly increases and result in the rise of need for
water in the warm seasons, to the extent that rate of evaporation during summer
months research 53.4 to 55.9 of the entir anume. Low quality of land for preservation
summer priod requires on efficient system of irrigation.
According tornth wite the most important climatic types in the region are arid or semi
arid with the objectives of this article are
i) to calculate the water balance climatic water budget of the basin, and …
ii) to show climatic types of the region.
By analyzing the water balance in the kashaf rud Basin, whit the decrease of
precipitation and in crease in temoerature, evaporation increases rapidly and a
profound shortage of water is expericnd during thewarmer months of the year. The
summerrate of evaporation is between 53.4 to 55.9 percent of annual evaporation.
Since the soil is deficient of water from late spring to early autumn, an efficient
irrigation system is required.
According to the “thornthwaite” method, the major climatic types in the basin
are arid and semi-arid, with a scarce surplus of water.
The results of the study of climatic water budget in kashaf rud basin have shown
that water-surplus is only during the cold months of the year and most of it is wasted.
Considering the dry and semi-arid climate of the region, a comprehensive irrigation
plan should be in the first priority of economic planning.