International Journal of Hydrology Science and Technology 

About: International Journal of Hydrology Science and Technology is an academic journal published by Inderscience Enterprises Ltd.. The journal publishes majorly in the area(s): Geology & Environmental science. It has an ISSN identifier of 2042-7808. Over the lifetime, 282 publications have been published receiving 1666 citations. The journal is also known as: Hydrology science and technology & IJHST.

Surface irrigation simulation models: a review

Abstract: This paper reviews the literature and results of more than one hundred published articles in scientific journals with respect to simulation of surface irrigation. The results showed that 53.4% of the simulations belong to furrow systems. It is 35.9% for border systems and 10.7% for basin irrigation. However, satisfactory simulations were 70.3%, 63.6%, and 54.5% for border, basin, and furrow systems, respectively. The priority of irrigation methods to simulate using hydrodynamic (HD) and other models is border, basin, and furrow irrigation. It is border, furrow, and basin for kinematic wave (KW) and volume balance (VB) models. Finally, this priority is basin, border, and furrow for zero inertia (ZI) model. Meanwhile, the models estimated advance and infiltration phases better than recession and runoff phases during an irrigation event.

Analysis of potential evapotranspiration using 11 modified temperature-based models

Abstract: The evapotranspiration was estimated using 11 temperature-based models and was compared with the FAO Penman-Monteith model The results showed that the modified Hargreaves-Samani models estimate the evapotranspiration better than the other models in the most provinces of Iran However, the values of R2 were less than 098 for 15 provinces of Iran Therefore, the models were calibrated and precision of estimation was increased (the values of R2 were less than 100 (with respect to two decimal numbers) for only five provinces in the modified models) The temperature-based models estimated the evapotranspiration in the north east and south west provinces of Iran better than other provinces The best precise methods were the modified Hargreaves-Samani 1 method for AL (before calibration) and the Hargreaves-Samani method for AR, the Modified Hargreaves-Samani 2 method for SE and GH, the modified Hargreaves-Samani 1 for FA, and the modified Hargreaves-Samani 3 for MZ (after calibration)

Comparison of solutions of Saint-Venant equations by characteristics and finite difference methods for unsteady flow analysis in open channel

Abstract: The unsteady flow can be analysed by Saint-Venant equations These equations can be solved by characteristics and finite difference methods The Saint-Venant equations are changed into four complete differential equations in characteristics method and these equations are solved by drawing two characteristics lines The Saint-Venant equations are changed into set nonlinear equations and are solved using Preissman scheme in finite difference method This set of equation is changed into linear equation using Newton-Rafson method and can be solved using Sparce method In this research, the results of the two method were compared and this was shown that: 1) these two methods can draw the surface profiles and flow hydrograph as well; 2) the finite difference method is more accurate than that one; 3) the mesh size in finite difference method can be larger than that one; 4) the difference between two methods are increased by increasing the time and distance

The analysis of the most important climatic parameters affecting performance of crop variability in a changing climate

Abstract: Projecting crop yield, under future climate plays a vital role in planning for supply and demand, especially in arid and semi-arid regions. The rice and potato are sensitive to variations in temperature and rainfall patterns, the present study was undertaken to assess the impact of climate change on these crop yields. Historical climate data from 1971-2005 were used as input to CROPWAT model to analyse the potential and actual evapotranspiration that affects crop yields. Furthermore, the generated local climatic data of future years (2006-2040), (2041-2075) and (2076-2100) under the severest scenario (RCP 8.5) from CMIP5 climate model are selected. Then the data were downscaled statistically and were inputted to the CROPWAT to determine the changes in ETo, Eta and crop yield from the baseline period for Zayandeh Rud river basin. The results indicate that all crops show increasing water requirement in the future period and enable us to generate the appropriate adaptation measures.

Evaluation of the impact of climate change on reference crop evapotranspiration in Hamedan-Bahar plain

Abstract: Climate change was simulated using the HADCM3 general circulation model and was downscaled using the LARS-WG downscaling model. After downscaling and uncertainty analysis, climatic parameters were generated until year 2090, assuming three emission scenarios A1, B1 and A1B. After fitting an equation for ETo, its future values were calculated for the simulation period. Results indicated an increase in the mean annual ETo under all three scenarios. The highest increase occurred under the A2 scenario and the lowest increase occurred under the B1 scenario. Comparison of monthly ETo values showed that although greenhouse gas emissions in the next 30-year period did not lead to a perceptible increase in ETo but severe long-term increase was predictable. According to predictions, the mean monthly ETo in the [cold months] in different scenarios did not change significantly and much of the increase occurring in the mean annual ETo was due to a significant increase in the monthly ETo in [hot months] of the year.