scholarly journals Impact of Gercus Formation Erosion and Rock Sliding on Duhok Dam Reservoir – Northern Iraq

2021 ◽  
pp. 1562-1569
Author(s):  
Sahad Ali Al-Talib ◽  
Azealdeen Salih Al-Jawadi ◽  
Abdul Sattar A. Al-Sanjari
Keyword(s):  
Environmental Impact ◽  
Geotechnical Properties ◽  
Dam Reservoir ◽  
Erosion And Deposition ◽  
Northern Iraq ◽  
Erosion Processes ◽  
Geotechnical Characteristics ◽  
Resistance To Sliding ◽  
The Stability ◽  
Weak Resistance

The environmental impact was illustrated by rockslide and erosion on the Duhok Dam and its reservoir. The evaluation of the geotechnical characteristics of the Gercus Formation was conducted. The research plan was divided into three phases, field, laboratory, and office works. The fieldwork included studying all the geological phenomena of the region related to the environmental impact. The laboratory work focused on studying the geotechnical properties of the various rock samples taken from the Gercus Formation. Rocklab program was used to define the geotechnical properties of a rock mass. The results indicated the weak resistance of the Gercus Formation rocks to weathering and erosion processes, as well as their weak resistance to sliding. These results indicate a kind of risk for this formation on the stability of the dam, as well as its effect on the size of the reservoir storage, due to erosion and deposition of huge amounts of sediments in the dam reservoir.

Modelling sediment resuspension and transport induced by ships propellers in ports – the study case of the Port of Genoa

2020 ◽  
Author(s):  
Antonio Guarnieri ◽  
Sina Saremi ◽  
Jacob H. Jensen ◽  
Andrea Pedroncini ◽  
Marco Vaccari ◽  
...  
Keyword(s):  
Bottom Topography ◽  
Sediment Resuspension ◽  
Daily Basis ◽  
Drastic Reduction ◽  
Erosion And Deposition ◽  
New Science ◽  
Sea Bed ◽  
Long Time ◽  
Study Case ◽  
The Stability

<p>The action of propellers induced jets on the seabed of ports and harbors might be responsible of erosion and deposition of sediment around the port basin, potentially inducing important variations of the bottom topography in the medium to long time scales. Such dynamics constantly repeated for long periods can result in drastic reduction of ships’ clearance - in the case of deposition - or might be a threat for the stability and duration of the structures - in the case of erosion in the close vicinity of births and decks. These sediment processes are sources of problems for the port managing authorities, both for the safety of navigation and for the optimization of the management and maintenance of the ports’ bottom.</p><p>In the present work we study by means of integrated numerical modeling the erosion and sediment transport induced by naval traffic in the passenger Port of Genoa (Italy) and we propose a novel delayed-mode methodology and new science-based tools useful to optimize and efficiently plan the maintenance of the port sea bed. Fully operational real-time tools can be further developed starting from the proposed methodology in order to monitor the dynamics of the sediment on a daily basis.</p>

Stress-Deformation State in the Rock Massif (Illustrated with the Example of Macedonia)

2015 ◽  
Vol 725-726 ◽  
pp. 214-219 ◽  
Author(s):  
Zlatko Zafirovski ◽  
Nikolay Vatin
Keyword(s):  
Geotechnical Properties ◽  
Rock Massif ◽  
Numerical Analyses ◽  
Water Tank ◽  
Surge Tank ◽  
Secondary Stress ◽  
Stability Analyses ◽  
Deformation State ◽  
Stress Deformation ◽  
The Stability

Main goal of this article is to introduce an used methodology of analyses for excavation of surge tank enlargement of HEC MATKA1. The way of combining of the methods for analyses of discontinual and continual media are explained. The main information’s about existing geological and geotechnical properties are also given, as a basis for analytical and numerical analyses. Some of the results from the stability analyses of structural controlled instabilities during excavation of water tank are presented. The newly secondary stress – deformation state as a result from enlargement (excavation) is analysed with program Z-SOIL.

scholarly journals Soil Erosion and Sediment Deposition Modelling at the Small Catchment Scale

Geografie ◽  
2012 ◽  
Vol 117 (2) ◽  
pp. 170-191 ◽  
Author(s):  
Barbora Vysloužilová ◽  
Zdeněk Kliment
Keyword(s):  
Soil Erosion ◽  
River Sediment ◽  
Agricultural Land ◽  
Catchment Scale ◽  
Erosion And Deposition ◽  
Small Catchment ◽  
Erosion Processes ◽  
Erosion Models ◽  
Deposition Processes ◽  
Gis Environment

Water erosion is considered to be the most important factor behind the degradation of agricultural land. Many methods of measuring soil erosion processes, using mathematical models, have been developed in recent years. The most widespread of these, USLE, and its modifications have been used as the basis for new erosion models. Two such models, USPED (Mitášová et al. 1996) and WaTEM/SEDEM (Van Rompaey et al. 2001; Van Oost et al. 2000; Verstraeten et al. 2002), have been utilized to study erosion and deposition processes in the experimental rural catchment of Černičí. River sediment transport is also calculated using the WaTEM/ SEDEM model. The results are discussed with results from USLE and a field survey. The article also presents brief instructions for implementing the models in a GIS environment.

scholarly journals BEHAVIOR OF PINDOS LIMESTONE DURING HIGH SLOPE EXCAVATION. AN APPROACH TO INTERPRETE AND SIMULATE THE BEHAVIOR OF THE FORMATION USING SLOPE STABILTY ANALYSIS METHODS

2004 ◽  
Vol 36 (4) ◽  
pp. 1853
Author(s):  
A. Σφέικος ◽  
Θ. Στιμάρατζης ◽  
A. Κίλιας ◽  
Β. Χρηστάρας
Keyword(s):  
Safety Factor ◽  
Dynamic Equilibrium ◽  
Stable State ◽  
Soil Mechanic ◽  
River Diversion ◽  
The Road ◽  
Rock Formations ◽  
Geotechnical Characteristics ◽  
Slope Excavation ◽  
The Stability

The Acheloos river diversion project includes also works which improve the condition of the infrastructure network in the area. One of them was the improvement of a section at the Mouzaki - Arta national road. The road is developed through geological formations of the Pindos Zone. In the Argithea area, Karditsa County, it cuts through Cretaceous limestone bearing Calpionella. This formation develops high and steep slopes, over 50 m high. It consists of thin to medium bedded limestone, showing locally chert intercalations, and gradational transition to siliceous limestone. Thin silt or clay layers separate bedding. The formations is strongly folded and intensively jointed. The initial design proposed the construction of a slope with H:V relationship of 1:4 and benches every 20 m. The designed geometry was during and soon after excavation destroyed, due to sliding of rock particles. A new geometry was developed possessing a more stable state of dynamic equilibrium. Our task is to investigate and simulate the behavior of this formation. Based on data from both laboratory analysis and literature we ascribed the limestone formation values for its geotechnical properties. Using these values we estimate the values for the Safety Factor for the geometrical features of the slope. We control the stability of the slope using both rock mechanics and soil mechanic methods. The results point that rock formations, like the Cretaceous limestone which exhibit variation in their composition, and high contrast between the geotechnical characteristics values of the composing elements, may be considered as a material with soil properties. The Safety Factor calculation using these assumptions for the above mentioned slope, resulted a geometry close to the one developed. Therefore we conclude that such rock material and formations may successfully be simulated as materials with soil geotechnical behavior.

scholarly journals GIS-technology and data of earth remote sensing to identify and predict ravine erosion development

2020 ◽  
Vol 27 ◽  
pp. 00113
Author(s):  
Almaz Sabirzyanov ◽  
Mikhail Panasyuk ◽  
Nikolai Trofimov ◽  
Svetlana Sochneva
Keyword(s):  
Remote Sensing ◽  
Environmental Impact ◽  
Remote Sensing Data ◽  
Gis Technology ◽  
Earth Remote Sensing ◽  
Factors Affecting ◽  
Erosion Processes ◽  
Geoinformation Technologies ◽  
The Republic ◽  
Negative Erosion

This article discusses the study of the process of ravine erosion using geoinformation technologies and Earth remote sensing data. Ravine erosion, which develops on the territory of the Verkhneuslonsky municipal region of the Republic of Tatarstan, is considered as a multifactorial process. The possibility of using freely available data to study the factors affecting ravine erosion is evaluated. It is shown that in modern conditions of increased anthropogenic environmental impact, especially in areas heavily divided by ravines, the use of GIS technology is sufficient in order to monitor and quickly respond to negative erosion processes occurring on agricultural lands.

scholarly journals GEOTECHNICAL PROPERTIES OF SALT MARSH AND TIDAL FLAT SUBSTRATES AT TILLINGHAM, ESSEX, UK.

2018 ◽  
pp. 55
Author(s):  
Helen Brooks ◽  
Iris Möller ◽  
Tom Spencer ◽  
Kate Royse ◽  
Simon James Price
Keyword(s):  
Salt Marsh ◽  
Systematic Study ◽  
Salt Marshes ◽  
Tidal Flat ◽  
Marsh Surface ◽  
Geotechnical Properties ◽  
Surface Erosion ◽  
Marsh Edge ◽  
Erosion Risk ◽  
Erosion Processes

Salt marshes and, to a lesser extent, tidal flats, attenuate incoming hydrodynamic energy, thus reducing flood and erosion risk in the coastal hinterland. However, marshes are declining both globally and regionally (the Northwest European region). Salt marsh resistance to incoming hydrodynamic forcing depends on marsh biological, geochemical and geotechnical properties. However, there currently exists no systematic study of marsh geotechnical properties and how these may impact both marsh edge and marsh surface erosion processes (e.g. surface removal, cliff undercutting, gravitational slumping). This has led to poor parameterization of marsh evolution models. Here, we present a systematic study of salt marsh and tidal flat geotechnical properties (shear strength, bulk density, compressibility, plasticity and particle size) at Tillingham, Essex, UK.

scholarly journals Geotechnical characteristics of unburnt colliery spoils after coal-recovery

2019 ◽  
Vol 262 ◽  
pp. 04006
Author(s):  
Tymoteusz Zydroń ◽  
Andrzej Gruchot ◽  
Eugeniusz Zawisza
Keyword(s):  
Slope Stability ◽  
Test Results ◽  
Coal Basin ◽  
Geotechnical Parameters ◽  
Coal Recovery ◽  
Geotechnical Characteristics ◽  
Upper Silesian Coal Basin ◽  
Materials Used ◽  
The Stability ◽  
Wave Passage

The aim of the study was to determine the geotechnical characteristics of the unburnt colliery spoils after coal-recovery from the dumping site of one of the mines of the Upper Silesian Coal Basin in Poland. Due to grain-size distribution of tested spoils their geotechnical properties were determined using medium-sized apparatuses. In order to verify the suitability of the studied spoils for the construction of hydraulic embankments, the seepage and stability calculations were conducted for models of hydraulic embankments including the effect of flood wave passage on stress conditions within the construction and their slope stability. The test results revealed, that the studied colliery spoils are characterized by favourable values of geotechnical parameters and they fulfil the requirements for soil materials used in the analysed type of constructions. The spoils are characterized by good compactibility, relatively low water permeability and average susceptibility to mechanical disintegration, which in the case of using this material for the construction of hydraulic embankments and using proper compaction technology, should reduce their susceptibility to weathering. The results of seepage and slope stability calculations for hydraulic embankments built of the studied spoils confirmed their suitability for that type of constructions, retaining the proper inclination of slopes, whereas the variant of embankment without sealing is safer from the stability viewpoint.

scholarly journals SEDIMENT EROSION AND DEPOSITION IN THE FORMER ARASE DAM RESERVOIR UNDER THE DAM REMOVAL PROJECT

2016 ◽  
Vol 72 (4) ◽  
pp. I_853-I_858
Author(s):  
Kazuaki OHTSUKI ◽  
Hiroki IYOOKA ◽  
Yasuo NIHEI ◽  
Yusuke YOSHIMORI ◽  
Shunsuke NAKAMURA ◽  
...  
Keyword(s):  
Dam Removal ◽  
Dam Reservoir ◽  
Erosion And Deposition ◽  
Sediment Erosion

scholarly journals Experimental Study on the Utilization of Fine Steel Slag on Stabilizing High Plastic Subgrade Soil

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Hussien Aldeeky ◽  
Omar Al Hattamleh
Keyword(s):  
Steel Slag ◽  
Dry Weight ◽  
Geotechnical Properties ◽  
Engineering Properties ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Geotechnical Characteristics ◽  
Subgrade Soil ◽  
Free Swell ◽  
High Plastic

The three major steel manufacturing factories in Jordan dump their byproduct, steel slag, randomly in open areas, which causes many environmental hazardous problems. This study intended to explore the effectiveness of using fine steel slag aggregate (FSSA) in improving the geotechnical properties of high plastic subgrade soil. First soil and fine steel slag mechanical and engineering properties were evaluating. Then 0%, 5%, 10%, 15%, 20%, and 25% dry weight of soil of fine steel slag (FSSA) were added and mixed into the prepared soil samples. The effectiveness of the FSSA was judged by the improvement in consistency limits, compaction, free swell, unconfined compression strength, and California bearing ratio (CBR). From the test results, it is observed that 20% FSSA additives will reduce plasticity index and free swell by 26.3% and 58.3%, respectively. Furthermore, 20% FSSA additives will increase the unconfined compressive strength, maximum dry density, and CBR value by 100%, 6.9%, and 154%. By conclusion FSSA had a positive effect on the geotechnical properties of the soil and it can be used as admixture in proving geotechnical characteristics of subgrade soil, not only solving the waste disposal problem.

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