Nidal A. Hadadin

• PhD
• Professor (Full) at University of Jordan

Sedimentation represents a serious threat to the dam and reduces its useable water storage and its life span. Due to erosion and sedimentation problems, a dam gradually loses its ability to store water for the purposes for which it was built. The Soil and Water Assessment Tool model (SWAT) was utilized to estimate the sediment yield in Wadi Al-Arab...

EXTENDED ABSTRACT Negli ultimi anni, la Giordania e altri Paesi del Medio Oriente sono stati interessati da inondazioni distruttive, con perdite di vite umane e danni alle infrastrutture. Questo studio analizza le inondazioni improvvise giornaliere nella regione del Wala, nella Giordania centrale, dove si è verificata la maggior parte delle alluvio...

The effects of basin hydrology on hydraulic geometry of channels variability for incised strhydreams were investigated using available field data sets and models of watershed hydrology and channel hydraulics for the Yazoo River basin, USA. The study presents the hydraulic geometry relations of bankfull discharge, channel width, mean depth, cross-se...

As a result of quick progression in computer and information technologies, computer modeling has become a vital tool in watershed research and management practices. Stanford Watershed Model (SWM) is an integrated physically based Watershed model that can be used to simulate water flow stream/canal network and overland runoff, interflow and evaporat...

The effects of basin hydrology on hydraulic geometry of channels variability for incised streams were investigated using available field data sets and models of watershed hydrology and channel hydraulics for the Yazoo River basin, USA. The study presents the hydraulic geometry relations of bankfull discharge, channel width, mean depth, cross-sectio...

This paper presents an analytical method to determine the effect of side wall correction factor on the sediment transport. The analysis is based on the computation of boundary shear stress distributions acting on the flow perimeter of prismatic open channels. The application depends on the principle of steady and uniform flow in smooth trapezoidal...

Without concrete action Jordan will face a water series problem in the near future. Jordan is a naturally water scarce country. Its climate ranges from semi-arid in the northwestern part of the country to arid desert in its eastern and southern reaches. Jordan is subjected to periodic droughts; water supply from surface sources has declined substan...

Volumes of rainwater harvested on-site are estimated by short-term storage capacity by two methods: graphical method and analytical method. The first method considers the difference between demand and supply over a specified period of time. The second uses random events to determine analytically, the storage capacity required to guarantee the draft...

All streams and rivers naturally overflow periodically. In the study area, flooding is a result of rainfall exceeding the absorptive capacity of soil and the flow capacity of waterways. In November, 2009, more than 90 mm of rain fell in Jeddah during just 4 h; this was nearly twice the average rainfall for an entire year and the heaviest rainfall i...

Landslides can be trigged by external mechanisms including undercutting of a slope by stream erosion, wave action, glaciers, or human activities as building intense or prolonged rainfall, rapid snow melt, or sharp fluctuations in groundwater levels. Shocks or vibrations caused by earthquakes or construction activity. Jordan is one of the countries...

Several traditional techniques have been used for estimating storm-water runoff from ungauged watersheds. Some of these techniques were applied to watersheds of Rashadia in south-eastern desert of Jordan. When engineers apply rainfall-runoff models for hydrologic design, there are difficulties in defining and quantifying peak discharges that are re...

Jordan is located in an arid to semi-arid zone where water resources are limited. The threat of water shortages is already a reality and Jordan is struggling to face the scarcity of water. The north-eastern Badia semi-desert (zone) of the Kingdom is a large area with a small population. Constructing a dam can boost the local economy by supplying th...

A bench-scale up-flow anaerobic sludge blanket (UASB) reactor was applied to start-up the anaerobic ammonium oxidation (Anammox) process from conventional return activated sludge. The reactor was operated for approximately 170 days and was fed synthetic wastewater containing mainly nitrite (NO −2 ) and ammonium (NH+4 ) as main substrates. After 106...

This study investigated the effect of cross sectional geometry on sediment transport rate. The processes of sediment transport are generally associated to environmental management, such as pollution caused by the forming of suspended sediment in the channel network of a watershed and preserving physical habitats and native vegetations, and engineer...

The large environmental challenge that Jordan faces today is the scarcity of water. Definitely, water is the significant feature in the population/resource equation where water resources in Jordan are limited and the country's population has continued to rise. A high rate of natural population growth, combined with massive influxes of refugees, has...

Many different cross sections were created along the eastern shores of the Dead Sea (DS). These geological cross sections were used to develop a geological model of the DS area and determine the groundwater directions in the area surrounding DS. The geological model showed that the direction of the groundwater flow is to the west and northwest dire...

Concurrent reconstructions of October—April precipitation at Madaba and Rabba gauging sites in central Jordan back to the year 1777 using a multivariate regression model are presented. The reconstruction model was calibrated using concurrent precipitation and tree-ring data for the period 1953–1981 The regression equation is significant (p < 0.05),...

We suggested general polices that can be implemented to improve the sustainability andserviceability of the water sector in Jordan. It is suggested that water legislations in Jordan need to beupdated to expand the involvement of the private sector to retain sustainable maintenance programmesthat effectively mend water distribution systems. Moreover...

: Sediment transport rates are a function of flow hydraulics, bed composition, and upstream sediment supply. Open-channel flow problems are relatively more difficult to solve than those of closed conduit because the shape and size of a natural channel vary in a wide range from rivulets to large rivers. While the artificial (manmade) channel has a r...

The DEC Project data was used to develop several regression relationships for incised channels (CEM Type IV or V). The shape factor that was developed for downstream hydraulic geometry regression analysis of CEM Types IV and V incised channel data is ψ= 0.206 0.114 29.39 s S d − . The shape factor (W/d) is directly proportional to the bed material...

This study includes a survey of the procedures available, techniques, and methods of handling and disposing of medical waste at medium (between 100 and 200 beds) to large (over 200 beds) size healthcare facilities located in Irbid city (a major city in the northern part of Jordan). A total of 14 healthcare facilities, including four hospitals and 1...

Jordan's natural resources are limited to support population in a sustainable manner. However, its environment is exposed to a number of threats. In order to best explain Jordan's environmental difficulties, it would be prudent to focus individually on each of these major concerns: water shortages, agriculture/land and air pollution. This study foc...

Brownlie developed two equations related to sediment transport. The first Equation may be used to determine the ratio between the mean sediment concentration in the cross section and the sediment concentration at the mean depth. The second Equation can be used to compute sediment transport. Both equations were evaluated in this study. The first equ...

Brownlie developed two equations related to sediment transport. The first Equation may be used to determine the ratio between the mean sediment concentration in the cross section and the sediment concentration at the mean depth. The second Equation can be used to compute sediment transport. Both equations were evaluated in this study. The first equ...

Variables needed for hydrologic design of hydraulic structures include the rainfall intensities, critical storm duration (concentration times for determination of peak discharges) for the catchments area, and the selected frequencies (return period). These variables together constitute the design storm. In this study, the relationship between the r...

Several at-station analyses have been carried out but none has become known regarding the variation in exponent values of depth, width and velocity for incised channels, which are discussed here. The rate at which the hydraulic geometry parameters change with discharge is quit important to define at-a-station hydraulic geometry relationships. The D...

Recycled wastewater provides a viable alternative resource for water scarce regions. Treatment costs are an obstacle for purification up to drinking water quality, but water of lower quality may still be used for irrigation purposes. Study results from the Jordan Valley indicate that impacts of the use of treated wastewater on agriculture and rural...