scholarly journals Assessing specific-capacity data and short-term aquifer testing to estimate hydraulic properties in alluvial aquifers of the Rocky Mountains, Colorado, USA

2021 ◽  
Vol 38 ◽  
pp. 100949
Author(s):  
Connor P. Newman ◽  
Zachary D. Kisfalusi ◽  
Michael J. Holmberg
Keyword(s):  
Rocky Mountains ◽  
Hydraulic Properties ◽  
Specific Capacity ◽  
Short Term ◽  
Aquifer Testing ◽  
Alluvial Aquifers ◽  
Capacity Data

scholarly journals Hydrogeological Conditions of Qazaniyah Sub-basin in Diyala / Iraq

2021 ◽  
pp. 3921-3931
Author(s):  
Zahraa. M. Muhsin ◽  
Qusai .Y. Al-Kubaisi
Keyword(s):  
Hydraulic Properties ◽  
Specific Capacity ◽  
Sedimentary Rocks ◽  
Storage Coefficient ◽  
Hydrogeological Conditions ◽  
And Storage

The study area is located in the eastern part of the Diyala Governorate close to the Iraqi-Iranian border. This study was set to investigate the hydrogeological calculations of northeast of Qazaniyah wells where the groundwater moves in directions of from the northeastern parts towards the southwestern par, that is, the same direction of the topography and the same direction of the tendency of the layers t. The study‘s region is characterized by visible geological layers or those that can be penetrated to a reasonable depth by wells which are sedimentary rocks deposited in continental or semi-continental conditions in the bays. From the study of the hydraulic properties of the two hydrogeological and exemplary systems, the values of transmissivity, permeability and storage coefficient are ranged between 1.94- 5.73 m2/day, 1.02- 3.92 m/day and1.40 x 10-5- 2.62 x 10-4, respectively. While the estimated value of transmissivities, which are obtained from specific capacity, ranged between 6.27- 8.62 m2/day. This variance in the values indicates the broad differences in the values Lithology of aquifers, which seems to be influenced by the strength and the number of fractures and joints.

Short-term effects of biochar and gypsum on soil hydraulic properties and sodicity in a saline-alkali soil

Pedosphere ◽  
2020 ◽  
Vol 30 (5) ◽  
pp. 694-702 ◽  
Author(s):  
Yue ZHANG ◽  
Jingsong YANG ◽  
Rongjiang YAO ◽  
Xiangping WANG ◽  
Wenping XIE
Keyword(s):  
Hydraulic Properties ◽  
Soil Hydraulic Properties ◽  
Short Term ◽  
Alkali Soil ◽  
Soil Hydraulic ◽  
Short Term Effects

Hydrogeological characterisation of regional faults and dolerite dykes in the Precambrian Basement and Karoo Supergroup (Tete Province, Mozambique)

2019 ◽  
Vol 122 (3) ◽  
pp. 343-356
Author(s):  
R.C. Minnaar ◽  
M.A. Dippenaar
Keyword(s):  
Groundwater Flow ◽  
Hydraulic Properties ◽  
Sequential Process ◽  
High Permeability ◽  
Vibrating Wire ◽  
Aquifer Testing ◽  
Groundwater Occurrence ◽  
Geophysical Surveys ◽  
Piezometric Surface ◽  
Level Monitoring

Abstract Faults and dolerite dykes within Basement- and Karoo-aquifers in northern Mozambique may increase groundwater occurrence but may also be barriers to groundwater flow. Should observation boreholes drilled into regional and local faults as well as dykes show a response to aquifer testing, it would be deduced that these hydrogeological discontinuities are not barriers to groundwater flow. The approach adopted for this study included a sequential process involving data acquisition through a hydrogeological fieldwork programme consisting of geophysical surveys, borehole drilling, aquifer testing, and groundwater level monitoring. The Zambezi Border and geological contact faults were characterised by high variability in hydraulic properties. Aquifer testing resulted in drawdown in observation boreholes as well as a reduction in piezometric surface in the installed vibrating wire piezometers located in different aquifer units, indicating the Zambezi Border- and geological contact-faults were not barriers to groundwater flow. Not all the northwest-southeast trending dykes acted as barriers to groundwater flow, as there were discreet intervals with relatively high permeability present.

scholarly journals Resistance of Geosynthetics against the Isolated and Combined Effect of Mechanical Damage under Repeated Loading and Abrasion

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3558
Author(s):  
Filipe Almeida ◽  
David Miranda Carlos ◽  
José Ricardo Carneiro ◽  
Maria de Lurdes Lopes
Keyword(s):  
Hydraulic Properties ◽  
Construction Materials ◽  
Mechanical Damage ◽  
Tensile Tests ◽  
Repeated Loading ◽  
Short Term ◽  
Engineering Structures ◽  
Wide Range ◽  
Materials Used ◽  
Reduction Factors

The behaviour of materials used for developing engineering structures should be properly foreseen during the design phase. Regarding geosynthetics, which are construction materials used in a wide range of engineering structures, the installation on site and the action of many degradation agents during service life may promote changes in their properties, endangering the structures in which they are applied. The evaluation of the damage suffered by geosynthetics, like installation damage or abrasion, is often carried out through laboratory tests. This work studied the behaviour of five geosynthetics (three geotextiles and two geogrids) after being individually and successively exposed to two degradation tests: mechanical damage under repeated loading and abrasion. The short-term mechanical and hydraulic behaviours of the geosynthetics were analysed by performing tensile tests and water permeability normal to the plane tests. Reduction factors were determined based on the changes occurred in the tensile strength of the geosynthetics. Findings showed that mechanical damage under repeated loading and abrasion tended to affect the mechanical and hydraulic properties of the geosynthetics and that the reduction factors calculated according to the traditional method may not be able to represent accurately the damage suffered by the materials when exposed successively to the degradation mechanisms.

scholarly journals Groundwater condition of Banepa area, Central Nepal

1970 ◽  
Vol 11 ◽  
pp. 31-40
Author(s):  
Suresh Shrestha ◽  
Suresh Das Shrestha
Keyword(s):  
Water Supply ◽  
Hydraulic Properties ◽  
Specific Capacity ◽  
Groundwater Potential ◽  
Lesser Himalaya ◽  
Alternative Source ◽  
Central Nepal ◽  
Basement Rocks ◽  
Hydrogeological Study ◽  
Groundwater Condition

Only surface water has been distributed in the Banepa Municipality area, Central Nepal by Nepal Water Supply Corporation (NWSC) and is not sufficient as per the demand of public. A hydrogeological study was made to know the groundwater potential of the area. Banepa lies entirely in the Lesser Himalaya and constitutes consolidated phyllite and metasandstone basement rocks, and Quaternary sediment of gravel, sand and carbonaceous clay deposited in the valley. The thickness of sediment ranges from 20 to 40 m, of which gravel, sand and clay individually approach upto 20, 5 and 15 m, respectively. Transmissivity of the aquifer varies from 0.8 to 3.15 m2/day. Hydraulic conductivity varies from 0.022 to 0.14 m/day and specific capacity varies from 1.2 to 72 m3/day/m in the study area. The thickness of the aquifer is low and the hydraulic properties are also not favorable to extract sufficient quantity of groundwater in Banepa area. Therefore, an alternative source of water supply should be explored to fulfill present and future water demand.   doi: 10.3126/bdg.v11i0.1540 Bulletin of the Department of Geology, Tribhuvan University, Kathmandu, Nepal, Vol. 11, 2008, pp. 31-40

Short-term effects of rice straw biochar on hydraulic properties and aggregate stability of an Acrisol

Soil Research ◽  
2021 ◽  
Author(s):  
Nathaniel Parker ◽  
Wim M. Cornelis ◽  
Kwame Agyei Frimpong ◽  
Eric Oppong Danso ◽  
Enoch Bessah ◽  
...  
Keyword(s):  
Rice Straw ◽  
Hydraulic Properties ◽  
Aggregate Stability ◽  
Short Term ◽  
Rice Straw Biochar ◽  
Short Term Effects

Benthic algal biomass — measurement and errorsThis paper is part of the series “Forty Years of Aquatic Research at the Experimental Lakes Area”.

2009 ◽  
Vol 66 (11) ◽  
pp. 1989-2001 ◽  
Author(s):  
Helen M. Baulch ◽  
Michael A. Turner ◽  
David L. Findlay ◽  
Rolf D. Vinebrooke ◽  
William F. Donahue
Keyword(s):  
Chlorophyll A ◽  
Rocky Mountains ◽  
Algal Biomass ◽  
Experimental Studies ◽  
High Variability ◽  
Algal Community ◽  
Canadian Rocky Mountains ◽  
Short Term ◽  
Experimental Lakes Area ◽  
Northwestern Ontario

While benthic algal biomass is one of the most commonly measured variables within littoral communities, it is also one of the most poorly characterized. The use of chlorophyll a as an estimate of biomass, while easy and inexpensive, can be affected by changes in environmental conditions and algal community composition. Biovolume-based measurements often have high variability and are affected by changes in cell volume due to preservation. Using 12 years of data from the Experimental Lakes Area (northwestern Ontario, Canada) as well as short-term surveys and experimental studies from the Experimental Lakes Area and the Canadian Rocky Mountains, we demonstrate that biovolume and chlorophyll a are often decoupled in the littoral zone of temperate oligotrophic lakes. We recommend that researchers revisit the limitations of both metrics and specifically caution against the use of chlorophyll a as a biomass indicator when light, temperature, or species composition vary significantly.

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