Paper Information

Journal:   JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)   JANUARY-FEBRUARY 2017 , Volume 30 , Number 6 #A0043; Page(s) 1888 To 1904.
 
Paper:  DEVELOPMENT AND APPLICATION OF THE QAUSI DISTRIBUTED WATER BALANCE MODEL (QDWB) IN THE NEISHABOOR-ROKH WATERSHED
 
Author(s):  RAZAVI S., DAVARY K.*, GAHRAMAN B., ZIAEI A.N., IZADY A., ESHAGHIAN K., SHAHEDI M., TALEBI F.
 
* WATER ENGINEERING DEPARTMENT FACULTY OF AGRICULTURE, FERDOWSI UNIVERSITY OF MASHHAD, MASHHAD, IRAN
 
Abstract: 

Introduction: During the last five decades there has been a sharp increase in water consumption owing to the population explosion, unprecedented rise in standard of living, and enormous economic development. Limitation of water resources in Iran motivates sustaining and preserving of these resources in order to supply future water needs. Fulfilling these objectives will not be possible unless accurate water balance of watersheds. An assessment of the available water resources is a pre-requisite to undertake an analysis of the stress on the water resources and to subsequently adopt appropriate management strategies to avoid adverse environmental effects and reconcile conflicts between users. Water balance models have been developed at various time scales (e.g. hourly, daily, monthly and yearly) and various spatial resolutions to varying degrees of complexity. Monthly water balance models were first developed in the 1940s by Thornthwaite (1948) and later revised by Thornthwaite and Mather (1955, 1957). These models have since been adopted, modified, and applied to wide spectrumof hydrological problems. Using GIS and computer models are useful tools for water balance calculating and results analyze. A spatial hydrology model is one which simulates the water flow and transport in a specified region of the earth using GIS data structures. The purpose of this study was to develop a computer model for rapid calculation of the water balance which is based on distributed meteorological data, and estimate uncertain factors of water balance on the basis of physical data. Try to minimize the complexity of the assumptions and also it is suitable for Basin water balance evaluation. Daily evapotranspiration and precipitation data were used to calculate daily changes of soil moisture balance, but the result is presented annually.

 
Keyword(s): QUASIDISTRIBUTED, NEIYSHABOUR-ROKH, WATER BALANCE, WATERSHED
 
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