۷ فروردین ۱۳۹۹
دسته:
کد : 404
Advanced Numerical Methods in Foundation Engineering

» عنوان : Advanced Numerical Methods in Foundation Engineering

Proceedings of the 3rd GeoMEast International Congress and Exhibition, Egypt 2019 on Sustainable Civil Infrastructures – The Official International Congress of the Soil-Structure Interaction Group in Egypt (SSIGE)

نویسندگان : Hany Shehata, Braja Das, A.P. S. Selvadurai, Ayman Fayed

از : Sustainable Civil Infrastructures

انتشار : Springer International Publishing, Year: 2020

شابک (ISBN ) : ۹۷۸-۳-۰۳۰-۳۴۱۹۲-۳,۹۷۸-۳-۰۳۰-۳۴۱۹۳-۰

تعداد صفحات :

فرمت : PDF

Description:

This book deals with the advanced analysis of the shallow foundations. Several research studies are considered including soil plasticity, cracking, reaching the soil bearing capacity, and creep. Dynamic analyses together with stability analysis are also included. It gives a wide range of dealing with the shallow foundations in different parts of the world.

Abstract:

Amman Zarqa Basin (AZB) is the most developed groundwater basin in the arid region of Jordan and faces water shortage and declining water table due to over exploitation to meet irrigation and domestic water demands.

Therefore, groundwater flow modeling for this watershed is a necessary tool for proper management of groundwater resources to protect AZB from depletion. MODFLOW was calibrated and used to simulate the behavior of the flow system under different pumping rates scenarios.

The conceptual model for Amman-Wadi Sir (B2/A7) aquifer system was formulated by one layer unconfined type overlaid by impervious layer (A1/6 aquitard) and calibrated for steady state condition by matching observed and simulated initial head contour lines.

Drawdown data for the period 1985–۱۹۹۵ was also used for calibration of the transient model by matching simulated drawdowns with observed ones, and then validated by using drawdown data for the period 1996–۲۰۰۲.

The results of the calibrated model showed that the horizontal hydraulic conductivity of the B2/A7 aquifer ranges between 0.007 to 45 m/d. Calibrated specific yield ranges from 0.001 to 0.15.

Three scenarios were conducted to predict the B2/A7 aquifer system response under different conditions during the period 2020–۲۰۳۰. The first scenario assumed that the pumping rates of year 2005 (110.4 MCM/year) are constant for 15, and 25 years.

The maximum drawdowns where found reached about 99.9 and 104.9 m in the years 2020, and 2030, respectively. The second scenario assumed that the present abstraction rates (110.4 MCM/year) is reduced to 80 MCM/year.

The maximum drawdowns were reduced to about 90, and 94.8 m in the years 2020 and 2030, respectively. The third scenario assumed an abstraction rate of only 65 MCM/year.

 

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