List of Articles Open Access Article Abstract Page Full-Text 1 - Evaluation of Pre-ozonation Unit Efficiency in Turbidity and TOC Removal (Case Study: Kouhsabz Water Treatment Plant) Bahman Masoomi Nematollah Jaafarzadeh Haghighi Fard Tayebeh Tabatabaei Esmael kouhgardi Sahand Jorfi Open Access Article Abstract Page Full-Text 2 - Temporal and Spatial Vvariability Analysis of Drought Hazard in Khuzestan Province Using Standardized Precipitation Index (SPI) fatemeh zohrabzadeh hossein eslami Open Access Article Abstract Page Full-Text 3 - Variations Trend Evaluation of Rainfall Using Mann-Kendall and Linear Regression in Khuzestan Province mostafa ghasabfeiz hossein eslami Open Access Article Abstract Page Full-Text 4 - Calculation of Sediment Entering a Karoon River Using GSTARS 3 Zahra Shojaeian Hamidreza KHodabakhshi Open Access Article Abstract Page Full-Text 5 - Trapezoidal Weir Guide Vanes Conduct the Discharge Coefficient Mohammad Montazemian Ebrahim Nohani Mohammad Heydarnejad Open Access Article Abstract Page Full-Text 6 - Estimation of Krieger Regional Coefficient in Mountainous Areas rohoullah mohtashamzadeh sajad mashali Bfhrooz Dahanzadeh