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Allen, R.G., Ppereira, L.S., Raes, D. and Smith, M. (1998) Crop Evapotranpiration (Guidelines for Computing Crop Water Requirement), Food and Agriculture Organization of the United Nations (FAO), Irrigation and Drainage Paper, No. 56, Rome.
http://www.fao.org/tempref/SD/Reserved/Agromet/PET/FAO_Irrigation_Drainage_Paper
_56.pdf

has been cited by the following article:

• TITLE: Water Runoff Estimation Using Geographical Information System (GIS) for Alrakhmah Basin Valley Northeast of Iraq

  AUTHORS: Abdulrazaq K. Abdulwahd, Mohammed Ch. Liejy, Mohanad A. Sulaiman, Nadhir Al-Ansari

  KEYWORDS: Geographic Information Systems (GIS), Digital Elevation Model (DEM), Spatial Data, Watershed

  JOURNAL NAME: Engineering, Vol.12 No.6, June 9, 2020

  ABSTRACT: The lack of water resources in many regions is the main challenge for the human being and to extended investigations. Water resources controlling and management is essential in the areas depending on the seasonal rainfall. This research aims to estimate the surface water runoff for Basin of Alrakhmah Valley located in the southwestern part of Kirkuk Province in northeastern of Iraq. Analyzing of Spatial data and Digital Elevation Model (DEM) data has been conducted using Geographic Information System (GIS) to estimate the hydrological properties for the watershed valley with 158.5 km2 surface area. The results showed that watershed valley type is from the fifth rank with a longitudinal shape and topography percentage of 0.568. The watershed textures found to be 3.24 and the drain density 1.5 at 3.49 river branching. Finally, the annual estimated surface water retreat according to the morpho-hydro climatic elements found to be 0.01286233 milliard cubic meter.