A5053124996- Hydrology and Sediment Transport Processes
- Hydraulic flow and structures
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Dam Engineering and Safety
- Hydrology and Drought Analysis
- Groundwater and Watershed Analysis
- Geotechnical Engineering and Underground Structures
- Water resources management and optimization
- Soil and Land Suitability Analysis
- Landslides and related hazards
- Plant Water Relations and Carbon Dynamics
- Transboundary Water Resource Management
- Irrigation Practices and Water Management
- Structural Engineering and Vibration Analysis
- Groundwater and Isotope Geochemistry
- Marine and environmental studies
- Water Quality and Pollution Assessment
- Aeolian processes and effects
- Groundwater flow and contamination studies
- Ichthyology and Marine Biology
- Precipitation Measurement and Analysis
- Climate Change and Environmental Impact
- Water Treatment and Disinfection
Soil Conservation and Watershed Management Research
2015-2024
Agricultural Research & Education Organization
2015-2024
Tishk International University
2022-2024
Universiti Putra Malaysia
2011
University of Auckland
2011
University of Tehran
2008
Mapping flood-prone areas is a key activity in flood disaster management. In this paper, we propose new susceptibility mapping technique. We employ ensemble models based on bagging as meta-classifier and K-Nearest Neighbor (KNN) coarse, cosine, cubic, weighted base classifiers to spatially forecast flooding the Haraz watershed northern Iran. identified using data from Sentinel-1 sensor. then selected 10 conditioning factors predict floods assess their predictive power Relief Attribute...
Flash floods are one of the most devastating natural hazards; they occur within a catchment (region) where response time drainage basin is short. Identification probable flash flood locations and development accurate susceptibility maps important for proper management region. With this objective, we proposed compared several novel hybrid computational approaches machine learning methods mapping, namely AdaBoostM1 based Credal Decision Tree (ABM-CDT); Bagging (Bag-CDT); Dagging (Dag-CDT);...
Abstract Ensuring accurate prediction of scour depth in culverts is essential for public safety, as uncertainties traditional empirical/deterministic equations make it a challenging task. The objective this study to investigate the performance numerical models predicting culvert scour’s downstream profile, its maximum depth, and location, was carried out by using Flow-3D software with Renormalized Group (RNG) turbulence model comparing these metrics actual observed data. Two hydrographs were...
The results of an experimental study on clear-water scour at pile groups under steady flows threshold velocity are presented. A wide range group arrangements, spacing, and submergence ratios studied. Uniform bed material in a 46-m long, 1.52-m wide, 1.9-m deep flume was used to obtain comprehensive data. Empirical relations demonstrate the effects studied variables On basis findings this study, new method predict effect ratio local depth is proposed. data obtained available from literature...
Risk of flash floods is currently an important problem in many parts Vietnam. In this study, we used four machine-learning methods, namely Kernel Logistic Regression (KLR), Radial Basis Function Classifier (RBFC), Multinomial Naïve Bayes (NBM), and Model Tree (LMT) to generate flood susceptibility maps at the minor part Nghe An province Center region (Vietnam) where recurrent problems are being experienced. Performance these methods was evaluated select best method for mapping. model...
Local scour depth at complex piers (LSCP) cause expensive costs when constructing bridges. In this study, a hybrid artificial intelligence approach of random subspace (RS) meta classifier, based on the reduced error pruning tree (REPTree) base namely RS-REPTree, was proposed to predict LSCP. A total 122 laboratory datasets were used and portioned into training (70%: 85 cases) validation (30%: 37 for modeling processes, respectively. The statistical metrics such as mean absolute (MAE), root...
We proposed an innovative hybrid intelligent approach, namely, the multiboost based naïve bayes trees (MBNBT) method for spatial prediction of landslides in Mu Cang Chai District Yen Bai Province, Vietnam. The MBNBT, which is ensemble (MB) and (NBT) base classifier, has rarely been applied landslide susceptibility mapping around world. For modeling, we selected 248 locations hilly terrain study area. Fifteen conditioning factors were construction database on one-R attribute evaluation (ORAE)...
The widespread use of culverts has prompted researchers to focus on developing precise designs prevent their failure caused by scouring at the culvert outlet. This study employed physical modelling investigate alternation in outlets under different conditions, including variations shape, blockage, and flow discharge during steady unsteady conditions. Box circular were examined with 0%, 15%, 30% blockage rates inlet. For two hydrographs generated, each nine distinct discharges, while for up...
Hesami A, Amini A. 2016. Changes in irrigated land and agricultural water use the Lake Urmia basin. Reserv Manage. 32:288–296.In basin, intensive agriculture relies heavily on irrigation systems using river-fed canals groundwater-supplied pressure systems, causing to shrink recent years. The loss of lake area has diminished productivity surrounding lands caused environmental out-migration substantial economic losses. Because resources basin are limited, government prohibited new development...
Landslides affect properties and the lives of a large number people in many hilly parts Vietnam world. Damages caused by landslides can be reduced understanding distribution, nature, mechanisms causes with help model studies for better planning risk management area. Development landslide susceptibility maps is one main steps management. In this study, objective to develop GIS based hybrid computational intelligence models generate Da Lat province, which prone regions Vietnam. Novel...
An experimental investigation of clear water scour at complex piers is presented. Five piers, comprising different configurations piles, pile cap, and column, were tested in a laboratory flume using uniform bed material. The for range possible elevations relative to the streambed elevation. Experiments undertaken also individual components each pier. A comparison results intact their enabled an evaluation prediction methods involving superposition depths pier column. method found give...
A laboratory study of local scour at complex piers under steady clear-water conditions is presented. The term used to define a bridge pier comprising column, pile cap, and group. Comprehensive data over the full range possible cap elevations for with different geometries were obtained using five models, which scaled down from existing bridges in Malaysia. are evaluate methodologies characterizing effective width varying location relative undisturbed streambed. effect on depth also addressed....
In recent years, the intensification of drought and unsustainable management use water resources have caused a significant decline in level Urmia Lake northwest Iran. This condition has affected lake, approaching an irreversible point such that many projects been implemented are being to save natural Lake, among which inter-basin transfer (IBWT) project from Zab River lake could be considered important project. The main aim this research is evaluation IBWT effects on Gadar destination basin....
For safe design of culverts, the estimation scour depth downstream culvert outlet is one most remarkable considerations. Poor culverts inevitably leads to destruction and increases expenditures on management rehabilitation. The objective this study investigate performance numerical models in predicting its location box unsteady flow conditions. Culverts with unblocked partially blocked outlets were used, predictions two turbulence methods, namely renormalization group (RNG) k-ε, compared....
An accurate estimate of scour depth downstream culvert outlets is essential for design integrity. Inadequate designs can result in structural failures, leading to increased costs maintenance and rehabilitation. The present research evaluates the efficacy numerical models predicting its location circular culverts under variable flow conditions. Two hydrographs were created unsteady flow, featuring nine different discharges, while steady conditions analysed at rates 14 l/s 22 l/s. study...
Abstract A groundwater quality map serves as a deterrent mechanism that provides insight into likely environmental health predicaments. The objective of this study was to create and evaluate the changes in during period Erbil, Iraq. Based on 13 parameters, water index (WQI) calculated for 61 wells from 2015 2017 wet dry seasons. To generate WQI maps, two geostatistical analyst tools Geographical Information Systems, including Kriging Inverse Distance Weighted (IDW) were used. For determining...
Pile scour is the main cause of bridge failure. A physical model used in this research to study around a group piles clear-water conditions. The examined changes stream bed, volume and area holes due pile spacing arrangements. For purpose, width, length depth hole variation also channel bed formation owing groups, their arrangement were studied. An experimental with 10 m, width 0.83 m 0.5 was used. covered medium-sized uniform sediments for 0.9 mm. discharge flow velocity adjusted In each...
Pile groups are frequently used to support bridge decks. Scour in the vicinity of piles is main cause for bridges failure. In this research, address effects uniform and nonuniform pile spacing on equilibrium scour depth, laboratory experiments were carried out under steady clear-water conditions. For purpose, depth produced by group with various arrangement was investigated using a flume. Flume bed covered sediments median size 0.9 mm 0.2 m thickness. Flow discharge velocity as well recorded...