scholarly journals Water volume and sediment volume and density in Lake Linganore between Boyers Mill Road Bridge and Bens Branch, Frederick County, Maryland, 2012

2013 ◽  
Author(s):  
Andrew J. Sekellick ◽  
William S.L. Banks ◽  
Michael K. Myers
Keyword(s):  
Water Volume ◽  
Sediment Volume ◽  
Frederick County ◽  
Mill Road

Flow and Sediment Conditions for the Yellow River Estuary Balance

2013 ◽  
Vol 405-408 ◽  
pp. 2226-2230
Author(s):  
Shou Bing Yu ◽  
Kai Rong Wang ◽  
Wan Zhan Wang
Keyword(s):  
Yellow River ◽  
River Estuary ◽  
Sediment Concentration ◽  
Yellow River Estuary ◽  
Water Volume ◽  
The Yellow River ◽  
Sediment Volume ◽  
Elevation Data ◽  
Annual Water ◽  
Sediment Data

Multi-object application and water and sediment regulation of the Xiaolangdi Reservoir since 2001 have changed the flow and sediment conditions entering the Lower Reaches of Yellow River and the Estuary. Field flow and sediment data at Lijin Hydrological Station and river cross section elevation data downstream from Lijin Section during 2001~2010 have shown that the Estuary have been in a state of little scouring. The 2D mathematical model has been used to study the flow and sediment conditions for the Yellow River Estuary balance. The conclusions have arrived at that total annual water volume is 196 × 108 m3, total annual sediment volume is 1.40~1.70×108 t, coarse sediment concentration is 3kg/m3.

scholarly journals Caracterización morfobatimétrica y estimación de sedimentos de la bahía interior de Puno, lago Titicaca, mediante tecnología SIG

2016 ◽  
Vol 18 (2) ◽  
Author(s):  
Alfredo Loza-Del-Carpio ◽  
César Gamarra-Peralta ◽  
Ninfa Condori-Aliaga
Keyword(s):  
Accumulation Rate ◽  
El Paso ◽  
Water Volume ◽  
Gis Technology ◽  
Technology Application ◽  
Sediment Volume ◽  
Palabras Clave ◽  
Lake Morphology ◽  
Sistemas De Informacion ◽  
Bathymetric Changes

<p>Los ecosistemas lénticos, tienden a sufrir cambios morfométricos y batimétricos con el paso del tiempo. Esta condición en la bahía interior de Puno, aún no ha sido detallada, por lo que el presente conllevó a su caracterización en los años 2010 y 2012, para compararla con la del año 1975,  además de estimar el volumen de sedimento acumulado en el lecho lacustre desde esa fecha. Para esto se digitalizaron las cartas batimétricas de 1975 y se hicieron levantamientos actuales mediante el uso de ecosonda y aplicación de tecnologías SIG; luego se trazaron isóbatas y construyeron mapas para comparar las variaciones. La estimación de sedimentos acumulados se realizó por diferencias de volumen de agua y cambios de profundidad entre los años mencionados. Los resultados refieren que las condiciones batimétricas han cambiado relativamente, manteniendo un fondo lacustre irregular, con profundidades máximas de 7.76 m para 1975, 7.07 m para 2010 y 7.19 para el 2012. Sus mayores áreas están ocupadas por profundidades menores a 1 m y los mayores volúmenes en las profundidades de 3 a 4 m. Los perfiles evidencian que la cubeta tiene un talud con mayor profundidad hacia la ciudad de Puno. El área para 1975 fue de 15.79 km<sup>2</sup> y para el 2012 de 15.9 km<sup>2</sup>; para el 2012 el volumen fue de 39 millones de m<sup>3</sup>, menor a 1975 que superó los 42 millones. El volumen de sedimentos acumulado desde 1975 hasta el año 2012 fue de 887352.02 m<sup>3</sup>, siendo la tasa de acumulación de 23982.48 m<sup>3</sup>/año y 4.1 mm/año.</p><p> </p><p><strong>Palabras clave: </strong>Isobatas, morfología lagos, perfiles de profundidad, Sistemas de Información Geográfica.</p><p>                                                    </p><p> </p><p align="center"><strong>Morphobathymetric characterization and sediments estimating of the Puno’s inner bay, Titicaca lake, by GIS technology</strong></p><p align="center"><strong>ABSTRACT</strong></p><p>Lentic ecosystems, suffers morphometric and bathymetric changes in the course of time. This condition at Puno's interior bay, has not yet been detailed, by which this research was orientated to its characterization in the years 2010 and 2012 to compare with 1975, in addition to estimate sediment volume accumulated in the water bed from that date. It digitalized bathymetric charts of 1975 and at present were done new charts by mean ecosound and GIS technology application to compare variations. Sediments accumulates volume was estimated by differences of water volume and in-depth changes between years mentioned. Results refer than bathymetric conditions have changed relatively, keeping an irregular profundity, maximum depths were 7.76 m for 1975, 7.07 m for 2010 and 7.19 by 2012. Largest areas are occupied by lower depths to 1 m and higher volumes in the depths of 3-4 m. Profiles evidence that the bucket has bigger inclination and depth toward Puno's city. 1975 area was 15.79 km<sup>2</sup> and for 2010 and 2012 was 15.9 km<sup>2</sup>; 2012 volume was 39 million m<sup>3</sup>, less than 1975 with more than 42 million. Sediment volume accumulated from 1975 until 2012 was 887352.02 m<sup>3</sup>, and accumulation rate of 23982.48 m<sup>3</sup>/year or 4.1 mm/year.</p><p> </p><p><strong>Key words: </strong>Isobaths, lake morphology, depth profiles, Geographic Information Systems.</p><p> </p>

scholarly journals Reservoir sedimentation impact downstream in a semi-arid basin with greenhouses cultivation

2018 ◽  
Vol 40 ◽  
pp. 03006
Author(s):  
Sergio Arjona ◽  
Agustín Millares ◽  
Asunción Baquerizo
Keyword(s):  
Water Volume ◽  
Medium Term ◽  
Rainfall Events ◽  
Structural Problems ◽  
Sediment Volume ◽  
Term Basis ◽  
Points Of View ◽  
To Come ◽  
Total Sediment

This work analyzes the loss of storage, in a medium-term basis, of Beninar reservoir (Almería, Spain) built in a semiarid watershed and its consequences downstream. The reservoir, in the Adra river basin (Southern Spain), was designed to supply water for the irrigation of more than 28.000 hectares of greenhouses. Its storage volume, that was initially of 68 hm3 in 1984, has been reduced approximately to half. The total sediment volume arrived to the reservoir during the last 32 years is 6,8 hm3, of which 1,68 hm3 are estimated to come from fluvial contributions. The results remark the torrential nature of rainfall events for generating large sediment contributions and highlights the importance of taking into account these types of events. The total loss of storage is especially relevant from two points of view 1) reduction of flood abatement due to sedimentation and structural problems of dam, which has left only 2 hm3 of regulation capacity and 2) loss of water volume which is essential to improve the water quality of the overexploited and salinized aquifers which supply the greenhouses downstream. Beninar reservoir is a key infrastructure to preserve a competitive price of water for greenhouse cultivation.

A large tectonic-controlled subglacial lake with ocean drainage in Princess Elizabeth Land, East Antarctica

2021 ◽  
Author(s):  
Shuai Yan ◽  
Donald D. Blankenship ◽  
Duncan A. Young ◽  
Jamin S. Greenbaum ◽  
Lin Li ◽  
...  
Keyword(s):  
Satellite Image ◽  
Image Data ◽  
Melting Rate ◽  
Water Volume ◽  
Ice Shelf ◽  
Ice Shelves ◽  
Subglacial Lake ◽  
Sediment Volume ◽  
Subglacial Lakes ◽  
Basal Melting

&lt;p&gt;The Princess Elizabeth Land (PEL) sector of the East Antarctic Ice Sheet, one of the largest grounded ice reservoirs in Antarctica, is adjacent to regions that experienced significant change during the last glacial maximum. The identification of subglacial water in PEL (to date only inferred from satellite image data) would provide important constraints on our estimation of the basal thermal condition in this region. Also, the existence of a large subglacial hydrology system in PEL comes with potential impacts on the basal melting rate and stability of downstream ice shelves, such as the West Ice Shelf. Here we present geophysical evidences confirming the existence of a large subglacial lake in PEL, hereby referred as Lake Snow Eagle (LSE), for the first time, using recently acquired aerogeophyscial data by international collaborations. We estimate LSE to be about 42 km in length and 370 km&lt;sup&gt;2&lt;/sup&gt; in area, making it one of the largest subglacial lakes in Antarctica. LSE is shown to lie in a subglacial canyon system that is linked to the coastal ice shelves, which makes LSE the first known major Antarctic interior water body that has a potential direct hydrological pathway into the ocean. We then systematically investigate its geological characteristics and bathymetry by 2-D geophysics modellings. We estimate the water volume of LSE to be about 21 km&lt;sup&gt;3&lt;/sup&gt;, while the sediment volume to be about 20 km&lt;sup&gt;3&lt;/sup&gt;. Our geophysical modelling results also suggest that LSE is located along a compressional geologic boundary, indicating possible tectonic controls over LSE.&lt;/p&gt;

Operation intensification methods of aggressive industrial sewage neutralization facilities

2020 ◽  
Vol 76 (11) ◽  
pp. 1149-1153
Author(s):  
N. S. Tsarev ◽  
V. I. Aksenov ◽  
I. I. Nichkova
Keyword(s):  
Cold Water ◽  
Specific Productivity ◽  
Technological Properties ◽  
Technological Parameters ◽  
Preliminary Heating ◽  
Sediment Treatment ◽  
Circulating Water ◽  
Equipment Operation ◽  
Sediment Volume ◽  
Industrial Sewage

To neutralize the waste pickling solutions and rinsing water, resulting from cleaning metal products s surface of rust by acids solutions, lime is used. Being cheap, this method of sewage neutralization has considerable drawbacks. Forming in the technological pipes strong gypsum depositions and low specific productivity of the equipment for sediment dewatering are most significant of them. Characteristic of aggressive industrial sewage, formed at pickling of ferrous metals presented. Methods of elimination of drawbacks of industrial sewage neutralization by lime considered, including stabilization of neutralized industrial sewage and control of properties of the sediment formed. It was noted, that stability of the circulating water can be provided by accelerating of crystallization of the forming gypsum sediments by introducing in it fine priming powder and heating the neutralized water up to 65-70 °С followed by thermal softening of a part of circulating water, removed out of the circulating system. It was shown, that the heating of the water and the ongoing changes of the composition and properties of the sediment result in decrease of filtration resistance 2-3 folds, increase of deposition speed 3-4 folds and decrease the sediment volume 1.5-2 folds comparing with lime neutralization in cold water. Calculated dozes of lime at the heating were taken the same as at the regular lime neutralization. Elimination of the circulating water oversaturation by bi-water gypsum can be reached also by addition into the water of powder-like gypsum pulp - priming powder for microcrystals of the gypsum, followed by aeration during 30-40 min. This method was tested under industrial conditions. Technological properties of the forming sediment can be improved by sediment treatment by flocculants and preliminary heating of the neutralized water up to 65-70 °С. Control of technological properties of the sediment is done by addition of flocculants and heating of the neutralized water. Recommendations for improving operation of the neutralization facilities presented with indicating particular technological parameters of the equipment operation for sewage and sediment treatment. 

Spatiotemporal Changes of Riverbed and Surrounding Environment in Yongding River (Beijing section) in the Past 40 Years

2020 ◽  
Vol 64 (4) ◽  
pp. 40407-1-40407-13 ◽  
Author(s):  
Ran Pang ◽  
He Huang ◽  
Tri Dev Acharya
Keyword(s):  
Economic Development ◽  
Water Conservation ◽  
Human Activities ◽  
Urban Areas ◽  
Water Volume ◽  
Cropland Area ◽  
The Past ◽  
Surrounding Environment ◽  
Spatiotemporal Changes ◽  
Yongding River

Abstract Yongding River is one of the five major river systems in Beijing. It is located to the west of Beijing. It has influenced culture along its basin. The river supports both rural and urban areas. Furthermore, it influences economic development, water conservation, and the natural environment. However, during the past few decades, due to the combined effect of increasing population and economic activities, a series of changes have led to problems such as the reduction in water volume and the exposure of the riverbed. In this study, remote sensing images were used to derive land cover maps and compare spatiotemporal changes during the past 40 years. As a result, the following data were found: forest changed least; cropland area increased to a large extent; bareland area was reduced by a maximum of 63%; surface water area in the study area was lower from 1989 to 1999 because of the excessive use of water in human activities, but it increased by 92% from 2010 to 2018 as awareness about protecting the environment arose; there was a small increase in the built-up area, but this was more planned. These results reveal that water conservancy construction, agroforestry activities, and increasing urbanization have a great impact on the surrounding environment of the Yongding River (Beijing section). This study discusses in detail how the current situation can be attributed to of human activities, policies, economic development, and ecological conservation Furthermore, it suggests improvement by strengthening the governance of the riverbed and the riverside. These results and discussion can be a reference and provide decision support for the management of southwest Beijing or similar river basins in peri-urban areas.

HOUSEHOLD WATER BALANCE AND ASSESSMENT OF WATER VOLUME FOR IRRIGATION IN AGRO LANDSCAPES OF THE KYZYLSU-YUZHNAYA BASIN

2020 ◽  
pp. 102-109
Author(s):  
D.KH. DOMULLODZHANOV ◽  
◽  
R. RAHMATILLOEV
Keyword(s):  
Water Balance ◽  
River Basin ◽  
Water Use ◽  
Storage Systems ◽  
Low Cost ◽  
Field Studies ◽  
Water Volume ◽  
Land Productivity ◽  
Household Water ◽  
And Storage

The article presents the results of the field studies and observations that carried out on the territory of the hilly, low-mountain and foothill agro landscapes of the Kyzylsu-yuzhnaya (Kyzylsu-Southern) River Basin of Tajikistan. Taking into account the high-altitude location of households and the amount of precipitation in the river basin, the annual volumes of water accumulated with the use of low-cost systems of collection and storage of precipitation have been clarified. The amount of water accumulated in the precipitation collection and storage systems has been established, the volume of water used for communal and domestic needs,the watering of livestock and the amount of water that can be used to irrigate crops in the have been determined. Possible areas of irrigation of household plots depending on the different availability of precipitation have been determined. It has been established that in wet years (with precipitation of about 10%) the amount of water collected using drip irrigation will be sufficient for irrigation of 0.13 hectares, and in dry years (with 90% of precipitation) it will be possible to irrigate only 0.03 ha of the household plot. On the basis of the basin, the total area of irrigation in wet years can be 4497 ha, and in dry years only 1087 ha. Taking into account the forecasts of population growth by 2030 and an increase in the number of households, the total area of irrigation of farmlands in wet years may reach 5703 hectares,and in dry years – 1379 hectares. Growing crops on household plots under irrigation contributes to a significant increase in land productivity and increases the efficiency of water use of the Kyzylsu-yuzhnaya basin.

Study of The Influence of Different Variables on Clathrate Practical Applications in Phenol Removal

2020 ◽  
Vol 38 (9A) ◽  
pp. 1373-1383
Author(s):  
Riyadh S. AL- Mukhtar ◽  
Shurooq T. Remedhan ◽  
Marwa N. Hussin
Keyword(s):  
Crystal Structures ◽  
High Capacity ◽  
Volume Ratio ◽  
Constant Speed ◽  
Water Volume ◽  
Phenol Removal ◽  
Process Performance ◽  
Economic Costs ◽  
Practical Applications ◽  
Glass Cell

In this work, effluent wastewater treated by using cyclopentane-water Clathrate system to treat water contaminates with phenols at concentrations (300, 250, 200, 150, 100 and 50) ppm in order to investigate the capability of process performance. Clathrate or hydrate are strong crystal structures including water (host particles) and little particles (guest particles). The experiments were conducted at different cyclopentane-water volume ratios (1: 2 and 1: 4). The work was done in a 250 ml glass cell with an electric mixer at a constant speed of 280 cycles per minute. Phenol was highest removal percent at 300ppm at 1: 4volume ratio was (92.3%), while the lowest concentration at 50 ppm and 1: 2volume ratio was (55%). Yield and Enrich factor had the highest values at the lowest concentration 50ppm and 1:2 volume ratio were (85% and 2.42) respectively. The technique of the Clathrate proved that it has a high capacity in the separation and achieve high removal percentage compared to other methods at standard conditions when the pressure of 1 atmosphere and temperature higher than the degree of freezing water and less economic costs compared to other methods.

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