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Letteratura scientifica selezionata sul tema "Environmental flow"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Environmental flow"

Kaleniuk, Maksym, Oleg Furman e Taras Postranskyy. "Influence of traffic flow intensity on environmental noise pollution". Transport technologies 2021, n. 1 (18 giugno 2021): 39–49. http://dx.doi.org/10.23939/tt2021.01.039.

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The modern urban environment, with the development of industry, the growth of the vehicle's number on the roads, and the increase in the density of buildings, is increasingly capable of negatively affect the health and well-being of the city's population. Among the factors influencing the environment is noise pollution, namely man-made noise - unwanted and harmful sounds created as a result of human activities. Today, noise is one of the most common factors of pollution among all others. The most common source of noise pollution is transport, including cars and trucks, buses, railways, airplanes, etc. The negative phenomenon of traffic noise is that almost everyone is greatly affected. This can often be accompanied by other harmful factors, such as vibration. According to scientific researches, noise can cause irritation under constant acoustic exposure. As a result, there are sleep disorders, decreased mental capacity, and the development of stress, and stress development in humans. Traffic noise is created from the operation of engines, the friction of wheels with the road surface, brakes, and aerodynamic features of vehicles, etc. In general, the level of traffic noise depends on such basic indicators as the intensity, speed, and composition of the traffic flow. Therefore, an important task is the study of traffic noise, its measurement, the establishment of appropriate dependencies, and further evaluation of the results. Knowing the level of noise generated by vehicles, further measures to reduce it are possible, such as redistribution of traffic flows on the road network, speed limits, improving the quality of the road surface, the use of basic means of reducing noise pollution, the use of noise protection devices, etc. Based on this, the negative impact of this phenomenon on the human body and the environment, in general, can be reduced.

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Growns, Ivor, e Ivars Reinfelds. "Environmental flow management using transparency and translucency rules". Marine and Freshwater Research 65, n. 8 (2014): 667. http://dx.doi.org/10.1071/mf13192.

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River flow regimes and their variability are considered by many authors to be the most important factor structuring their physical and ecological environment. In regulated rivers, environmental or instream flows are the main management technique used to ameliorate the ecological effects of flow alteration. We highlight two concepts that are not commonly used in a managed flow regime but help return natural flow variability to a managed river, namely, transparent and translucent flow rules. Transparency flows target lower flows up to a defined threshold so that all inflows are released from a dam or are protected from abstraction. Translucency flows form a percentage of inflows greater than the transparency threshold that are released to maintain a proportion of flow pulses in the river system. The main ecological concept underlying transparency and translucency flows is that riverine biota are adapted to the historical flow regime. Although the loss of small to moderate flood events may arise from implementation of translucency and/or transparency flow regimes, we advocate that these rule types would, nonetheless, be beneficial in many managed flow regimes and present two case studies where they have been defined and implemented.

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Opdyke, Daniel R., Edmund L. Oborny, Samuel K. Vaugh e Kevin B. Mayes. "Texas environmental flow standards and the hydrology-based environmental flow regime methodology". Hydrological Sciences Journal 59, n. 3-4 (3 aprile 2014): 820–30. http://dx.doi.org/10.1080/02626667.2014.892600.

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Chen, Ang, Miao Wu e Michael E. McClain. "Classifying Dams for Environmental Flow Implementation in China". Sustainability 12, n. 1 (21 dicembre 2019): 107. http://dx.doi.org/10.3390/su12010107.

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The implementation of environmental flows is of the utmost importance for ecosystem protection and restoration in dammed rivers. A key challenge in optimizing dam regulation is the uncertainty of the ecohydrology relationship between flow release and ecological response. In the present paper, we develop a framework of dam classification to organize the categories of the ecohydrology relationship for implementing environmental flows. Dams are classified from three major categories that differ in dam properties, hydrological alteration, and downstream hydrobiological diversities based on the relationship of hydrology and ecology. Finally, 773 dams in China are screened and ranked into four classes involving a great diversity of environmental flow components. A classification of dams that utilizes the implementation of environmental flows is presented. (1) Class 1 includes dams with rare and endangered fish species in the downstream. It is the category with the highest priority for environmental flow releases and regulation, requiring continuous flow and flood pulse components for fish spawning and migration. (2) Class 2 includes dams with significant hydrological alteration in the downstream. It is the category with second priority for environmental flow releases and regulation, requiring natural hydrological regimes simulation or complete flow component recovery for optimizing the flow duration curve and mitigating adverse impacts of dam operation. (3) Class 3 includes dams with a high degree of regulation where there is urgency for environmental flow releases and regulation, requiring that minimum flow is guaranteed by cascade reservoir regulation. (4) Class 4 includes dams with a low degree of regulation where there is less urgency for environmental flow releases and regulation. This classification method is important for future research, including environmental flow release regulation and the effectiveness evaluation of environmental flow adaptive management. It will be useful for guiding the implementation of environmental flows.

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Gimbert, Laura J., Kevin N. Andrew, Philip M. Haygarth e Paul J. Worsfold. "Environmental applications of flow field-flow fractionation (FIFFF)". TrAC Trends in Analytical Chemistry 22, n. 9 (ottobre 2003): 615–33. http://dx.doi.org/10.1016/s0165-9936(03)01103-8.

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Pastor, A. V., F. Ludwig, H. Biemans, H. Hoff e P. Kabat. "Accounting for environmental flow requirements in global water assessments". Hydrology and Earth System Sciences 18, n. 12 (11 dicembre 2014): 5041–59. http://dx.doi.org/10.5194/hess-18-5041-2014.

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Abstract. As the water requirement for food production and other human needs grows, quantification of environmental flow requirements (EFRs) is necessary to assess the amount of water needed to sustain freshwater ecosystems. EFRs are the result of the quantification of water necessary to sustain the riverine ecosystem, which is calculated from the mean of an environmental flow (EF) method. In this study, five EF methods for calculating EFRs were compared with 11 case studies of locally assessed EFRs. We used three existing methods (Smakhtin, Tennant, and Tessmann) and two newly developed methods (the variable monthly flow method (VMF) and the Q90_Q50 method). All methods were compared globally and validated at local scales while mimicking the natural flow regime. The VMF and the Tessmann methods use algorithms to classify the flow regime into high, intermediate, and low-flow months and they take into account intra-annual variability by allocating EFRs with a percentage of mean monthly flow (MMF). The Q90_Q50 method allocates annual flow quantiles (Q90 and Q50) depending on the flow season. The results showed that, on average, 37% of annual discharge was required to sustain environmental flow requirement. More water is needed for environmental flows during low-flow periods (46–71% of average low-flows) compared to high-flow periods (17–45% of average high-flows). Environmental flow requirements estimates from the Tennant, Q90_Q50, and Smakhtin methods were higher than the locally calculated EFRs for river systems with relatively stable flows and were lower than the locally calculated EFRs for rivers with variable flows. The VMF and Tessmann methods showed the highest correlation with the locally calculated EFRs (R2=0.91). The main difference between the Tessmann and VMF methods is that the Tessmann method allocates all water to EFRs in low-flow periods while the VMF method allocates 60% of the flow in low-flow periods. Thus, other water sectors such as irrigation can withdraw up to 40% of the flow during the low-flow season and freshwater ecosystems can still be kept in reasonable ecological condition. The global applicability of the five methods was tested using the global vegetation and the Lund-Potsdam-Jena managed land (LPJmL) hydrological model. The calculated global annual EFRs for fair ecological conditions represent between 25 and 46% of mean annual flow (MAF). Variable flow regimes, such as the Nile, have lower EFRs (ranging from 12 to 48% of MAF) than stable tropical regimes such as the Amazon (which has EFRs ranging from 30 to 67% of MAF).

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Suwal, Naresh, Alban Kuriqi, Xianfeng Huang, João Delgado, Dariusz Młyński e Andrzej Walega. "Environmental Flows Assessment in Nepal: The Case of Kaligandaki River". Sustainability 12, n. 21 (22 ottobre 2020): 8766. http://dx.doi.org/10.3390/su12218766.

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Environmental flow assessments (e-flows) are relatively new practices, especially in developing countries such as Nepal. This study presents a comprehensive analysis of the influence of hydrologically based e-flow methods in the natural flow regime. The study used different hydrological-based methods, namely, the Global Environmental Flow Calculator, the Tennant method, the flow duration curve method, the dynamic method, the mean annual flow method, and the annual distribution method to allocate e-flows in the Kaligandaki River. The most common practice for setting e-flows consists of allocating a specific percentage of mean annual flow or portion of flow derived from specific percentiles of the flow duration curve. However, e-flow releases should mimic the river’s intra-annual variability to meet the specific ecological function at different river trophic levels and in different periods over a year covering biotas life stages. The suitability of the methods was analyzed using the Indicators of Hydrological Alterations and e-flows components. The annual distribution method and the 30%Q-D (30% of daily discharge) methods showed a low alteration at the five global indexes for each group of Indicators of Hydrological Alterations and e-flows components, which allowed us to conclude that these methods are superior to the other methods. Hence, the study results concluded that 30%Q-D and annual distribution methods are more suitable for the e-flows implementation to meet the riverine ecosystem’s annual dynamic demand to maintain the river’s health. This case study can be used as a guideline to allocate e-flows in the Kaligandaki River, particularly for small hydropower plants.

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Williams, John G. "Sampling for Environmental Flow Assessments". Fisheries 35, n. 9 (settembre 2010): 434–43. http://dx.doi.org/10.1577/1548-8446-35.9.434.

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Giusti, Serena, Daniele Mazzei, Ludovica Cacopardo, Giorgio Mattei, Claudio Domenici e Arti Ahluwalia. "Environmental Control in Flow Bioreactors". Processes 5, n. 4 (7 aprile 2017): 16. http://dx.doi.org/10.3390/pr5020016.

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Wang, Xi-kun, e Soon Keat Tan. "Environmental fluid dynamics-jet flow". Journal of Hydrodynamics 22, S1 (ottobre 2010): 962–67. http://dx.doi.org/10.1016/s1001-6058(10)60067-4.

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Tesi sul tema "Environmental flow"

Goz, Caglayan. "Instream Flow Methodologies: Hydrological Environmental Flow Assessment In Pazarsuyu River". Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615004/index.pdf.

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In Turkey with increasing energy demand by industrialization and urbanization, hydropower seemed to be the most environmental friendly and sustainable solution for the problem. However, hydropower has also environmental effects especially when hydropower projects are numerous on a single river, and they use almost entire water in the river. Environmental flow as a new term became popular in media with increased density of small hydropower projects in Turkey. It is the required flow in the part of diversion for Run-off River type of hydropower plant in order to protect health of the river
in other words, to balance components of the river, including physico-chemical quality standards, surface and groundwater, geomorphological dynamics, social, economic, cultural and landscape values. In this study, an analysis utilizing hydrological (desktop) environmental flow assessment methods is prepared for Turkey, focusing on the Pazarsuyu Basin as a case study, and the results are compared with the applications done by the Governmental Institutions. Moreover, insufficient applications with regard to environmental flow assessment are given and reasons for public concerns are pointed out due to small hydropower development in Turkey.

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Peng, Yong. "Lattice Boltzmann simulations of environmental flow problems in shallow water flows". Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/8233/.

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The lattice Boltzmann method (LBM) proposed about decades ago has been developed and applied to simulate various complex fluids. It has become an alternative powerful method for computational fluid dynamics (CFD). Although most research on the LBM focuses on the Navier-Stokes equations, the method has also been developed to solve other flow equations such as the shallow water equations. In this thesis, the lattice Boltzmann models for the shallow water equations and solute transport equation have been improved and applied to different flows and environmental problems, including solute transport and morphological evolution. In this work, both the single-relaxation-time and multiple-relaxation-time models are used for shallow water equations (named LABSWE and LABSWEMRT, respectively), and the large eddy simulation is incorporated into the LABSWE (named LABSWETM) for turbulent flow. The capability of the LABSWETM was firstly tested by applying it to simulate free surface flows in rectangular basins with different length -width ratios, in which the characteristics of the asymmetrical flows were studied in details. The LABSWEMRT was then used to simulate the one- and two-dimensional shallow water flows over discontinuous beds. The weighted centred scheme for force term, together with the bed height for a bed slope, was incorporated into the model to improve the simulation of water flows over a discontinuous bed. The resistance stress was also included to investigate the effect of the local head loss caused by flows over a step. Thirdly, the LABSWEMRT was extended to simulate a moving body in shallow water. In order to deal with the moving boundaries, three different schemes with second-order accuracy were tested and compared for treating curved boundaries. An additional momentum term was added to reflect the interaction between the following fluid and the solid, and a refilled method was proposed to treat the wetted nodes moving out from the solid nodes. Fourthly, both LABSWE and LABSWEMRT were used to investigate solute transport in shallow water. The flows are solved using LABSWE and LABSWEMRT, and the advection-diffusion equation for solute transport was solved with a LBM-BGK model based on the D2Q5 lattice. Three cases: open channel flow with a side discharge, shallow recirculation flow and flow in a harbour, were simulated to verify the methods. In addition, the performance of LABSWEMRT and LABSWE were compared, and the results showed that the LABSWMRT has better stability and can be used for flow with high Reynolds number. Finally, the lattice Boltzmann method was used with the Euler-WENO scheme to simulate morphological evolution in shallow water. The flow fields were solved by the LABSWEMRT with the improved scheme for the force term, and the fifth order Euler-WENO scheme was used to solve the morphological equation to predict the morphological evolution caused by the bed-load transport.

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Regnier, Eva Dorothy. "Discounted cash flow methods and environmental decisions". Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/24544.

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Petsul, Peter Haei. "Micro-flow injection analysis for environmental studies". Thesis, University of Hull, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322521.

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Durham, William McKinney. "Phytoplankton in flow". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70868.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 111-120).
Phytoplankton are small, unicellular organisms, which form the base of the marine food web and are cumulatively responsible for almost half the global production of oxygen. While phytoplankton live in an environment characterized by ubiquitous fluid motion, the impacts of hydrodynamic conditions on phytoplankton ecology remain poorly understood. In this thesis, we propose two novel biophysical mechanisms that rely on the interaction between phytoplankton motility and fluid shear and demonstrate how these mechanisms can drive thin phytoplankton layers and microscale cell aggregations. First, we consider 'thin phytoplankton layers', important hotspots of ecological activity that are found meters beneath the ocean surface and contain cell concentrations up to two orders of magnitude above ambient. While current interpretations of their formation favor abiotic processes, many phytoplankton species found in these layers are motile. We demonstrate that layers can form when the vertical migration of phytoplankton is disrupted by hydrodynamic shear. Using a combination of experiments, individual-based simulations, and continuum modeling, we show that this mechanism - which we call 'gyrotactic trapping' - is capable of triggering thin phytoplankton layers under hydrodynamic conditions typical of the environments that often harbor thin layers. Second, we explore the potential for turbulent shear to produce patchiness in the spatial distribution of motile phytoplankton. Field measurements have revealed that motile phytoplankton form aggregations at the smallest scales of marine turbulence - the Kolmogorov scale (typically millimeters to centimeters) - whereas non-motile cells do not. We propose a new mechanism for the formation of this small-scale patchiness based on the interplay of gyrotactic motility and turbulent shear. Contrary to intuition, turbulence does not stir a plankton suspension to homogeneity, but instead drives patchiness. Using an analytical model of vortical flow we show that motility can give rise to a striking array of patchiness regimes. We then test this mechanism using both laboratory experiments and isotropic turbulent flows generated via Direct Numerical Simulation. We find that motile phytoplankton cells rapidly form aggregations, whereas non-motile cells remain randomly distributed. In summary, this thesis demonstrates that microhydrodynamic conditions play a fundamental role in phytoplankton ecology and, as a consequence, can contribute to shape macroscale characteristics of the Ocean.
by William McKinney Durham.
Ph.D.

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Cappiello, Alessandra 1972. "Modeling traffic flow emissions". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84328.

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Banijamali, Bahareh. "Development of a flow-condition-based interpolation 9-node element for incompressible flows". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/34642.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2006.
Includes bibliographical references.
The Navier-Stokes equations are widely used for the analysis of incompressible laminar flows. If the Reynolds number is increased to certain values, oscillations appear in the finite element solution of the Navier-Stokes equations. In order to solve for high Reynolds number flows and avoid the oscillations, one technique is to use the flow condition-based interpolation scheme (FCBI), which is a hybrid of the finite element and the finite volume methods and introduces some upwinding into the laminar Navier-Stokes equations by using the exact solution of the advection-diffusion equation in the trial functions in the advection term. The previous works on the FCBI procedure include the development of a 4-node element and a 9-node element consisting of four 4-node sub-elements. In this thesis, the stability, the accuracy and the rate of convergence of the already published FCBI schemes is studied. In addition, a new FCBI 9-node element is proposed that obtains more accurate solutions than the earlier proposed FCBI elements. The new 9-node element does not obtain the solution as accurate as the Galerkin 9-node elements but the solution is stable for much higher Reynolds numbers (than the Galerkin 9-node elements), and accurate enough to be used to find the structural responses in fluid flow structural interaction problems. The Cubic-Interpolated Pseudo-particle (CIP) scheme is a very stable finite difference technique that can solve generalized hyperbolic equations with 3rd order accuracy in space.
(cont.) In this thesis, in order to solve the Navier-Stokes equations, the CIP scheme is linked to the finite element method (CIP-FEM) and the FCBI scheme (CIP-FCBI). From the numerical results, the CIP-FEM and the CIP-FCBI methods appear to predict the solution more accurate than the traditional finite element method and t;he FCBI scheme. In order to obtain accurate solutions for high Reynolds number flows, we require a finer mesh for the finite element and the FCBI methods than for the CIP-FEM and the CIP-FCBI methods. Linking the CIP method to the finite element and the FCBI methods improves the accuracy for the velocities and the derivatives. In addition, when the flow is not at the steady state and the time dependent terms need to be included in the Navier-Stokes equations, or in the problems when the derivatives of the velocities need to be obtained to high accuracy, the CIP-FCBI method is more convenient than the FCBI scheme.
by Bahareh Banijamali.
Ph.D.

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Schneur, Rina. "Scaling algorithms for multicommodity flow problems and network flow problems with side constraits". Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13710.

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Murphy, Enda. "Longitudinal dispersion in vegetated flow". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/34603.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2006.
Includes bibliographical references (p. 171-183).
Vegetation is ubiquitous in rivers, estuaries and wetlands, strongly influencing both water conveyance and mass transport. The plant canopy affects both mean and turbulent flow structure, and thus both advection and dispersion. Accurate prediction of the fate and transport of nutrients, microbes, dissolved oxygen and other scalars depends on our ability to quantify vegetative impacts. In this thesis, the focus is on longitudinal dispersion, which traditionally has been modeled by drawing analogy to rough boundary layers. This approach is inappropriate in many cases, as the vegetation provides a significant dead zone, which may trap scalars and augment dispersion. The dead zone process is not captured in the rough boundary model. This thesis describes a new theoretical model for longitudinal dispersion in a vegetated channel, which isolates three separate contributory processes. To evaluate the performance of the model, tracer experiments and velocity measurements were conducted in a laboratory flume. Results show that the mechanism of exchange between the free stream and the vegetated region is critical to the overall dispersion, and is primarily controlled by the canopy density.
(cont.) A numerical random walk particle-tracking model was developed to assess the uncertainty associated with the experimental data. Results suggest that the time scale required to obtain sound experimental data in tracer studies is longer than the commonly used Fickian time scale.
by Enda Murphy.
S.M.

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Assemi, Shoeleh 1963. "Use of flow field-flow fractionation for the characterisation of humic substances". Monash University, Dept. of Chemistry, 2000. http://arrow.monash.edu.au/hdl/1959.1/9028.

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Libri sul tema "Environmental flow"

Pedersen, Flemming Bo. Environmental hydraulics: Stratified flows. Berlin: Springer-Verlag, 1986.

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R, Grimshaw, a cura di. Environmental stratified flows. Boston: Kluwer Academic Publishers, 2002.

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San Francisco County Transportation Authority. Doyle Drive environmental and design study: Initial environmental study. San Francisco, Calif: San Francisco Transportation Authority, 2000.

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Garrigues, Debi. Reservoir drawdowns vs. flow augmentation. Salem, Or: Legislative Committee Office, 1992.

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Helmut, Rechberger, a cura di. Practical handbook of material flow analysis. Boca Raton, Fla: Lewis, 2004.

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United States. Dept. of Energy. Office of Environmental Audit. Environmental audit of the coal-fired flow facility (CFFF). Washington, DC: U.S. Dept. of Energy, Office of Environmental Audit, 1992.

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Audit, United States Dept of Energy Office of Environmental. Environmental audit of the coal-fired flow facility (CFFF). Washington, DC: U.S. Dept. of Energy, Office of Environmental Audit, 1992.

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Kondoh, Akihiko. Study on the groundwater flow system by environmental tritium in Ichihara region, Chiba Prefecture. [Sakura-mura] Ibaraki, Japan: Environmental Research Center, University of Tsukuba, 1985.

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Go with the flow. Kent Town, S. Aust: Wakefield Press, 2009.

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M, Chadam John, a cura di. Resource recovery, confinement, and remediation of environmental hazards. New York: Springer, 2002.

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Più fonti

Capitoli di libri sul tema "Environmental flow"

Thomas, Hywel Rhys, e Stephen William Rees. "Isothermal Flow". In Environmental Geomechanics, 83–130. Vienna: Springer Vienna, 2001. http://dx.doi.org/10.1007/978-3-7091-2592-2_2.

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Holzbecher, Ekkehard. "Flow Modeling". In Environmental Modeling, 217–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22042-5_11.

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Riestra, Francisco. "Environmental Flow Policy". In Water Policy in Chile, 103–15. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76702-4_7.

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Kalbacher, Thomas, Xi Chen, Ying Dai, Jürgen Hesser, Xuerui Wang e Wenqing Wang. "Richards Flow". In Terrestrial Environmental Sciences, 121–30. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11894-9_4.

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Shao, Hua, Wenkui He, Milan Hokr, Payton W. Gardner, Herbert Kunz e Ales Balvin. "Flow Processes". In Terrestrial Environmental Sciences, 33–39. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29224-3_3.

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Huang, Yonghui, e Haibing Shao. "Multiphase Flow". In Terrestrial Environmental Sciences, 107–16. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29224-3_6.

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Thomas, Hywel Rhys, Michael Sansom e Stephen William Rees. "Non-Isothermal Flow". In Environmental Geomechanics, 131–69. Vienna: Springer Vienna, 2001. http://dx.doi.org/10.1007/978-3-7091-2592-2_3.

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Kondolf, G. Mathias, Remi Loire, Hervé Piégay e Jean-Réné Malavoi. "Dams and channel morphology". In Environmental Flow Assessment, 143–61. Chichester, UK: John Wiley & Sons, Ltd, 2019. http://dx.doi.org/10.1002/9781119217374.ch8.

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Holzbecher, Ekkehard. "Potential and Flow Visualization". In Environmental Modeling, 265–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22042-5_14.

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Walther, Marc, Leonard Stoeckl, Jens-Olaf Delfs e Thomas Graf. "Density-Dependent Flow". In Terrestrial Environmental Sciences, 205–12. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11894-9_8.

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Atti di convegni sul tema "Environmental flow"

Fernando, H. J. S., e G. Wang. "ENVIRONMENTAL FLUID MOTIONS". In First Symposium on Turbulence and Shear Flow Phenomena. Connecticut: Begellhouse, 1999. http://dx.doi.org/10.1615/tsfp1.20.

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Katopodes, Nikolaos D. "Control of Flow and Mixing in Environmental Flows". In World Environmental and Water Resources Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40976(316)467.

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Zhang, Andi. "Multiphase flow model of the transition between Darcy flow and Forchheimer flow". In World Environmental and Water Resources Congress 2013. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412947.050.

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Guan, Yiqing, Yan Shen e Danrong Zhang. "River Basin Environmental Flow Calculation". In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163356.

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Samson, E. B., J. A. Stark e M. G. Grote. "Two-Phase Flow Header Tests". In Intersociety Conference on Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1987. http://dx.doi.org/10.4271/871440.

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Frampton, R., J. Walleshauser, U. Bonne, D. Kubisiak, D. Hoy, I. Andu e K. Kelly. "Gas Mass Flow Sensor Proof of Concept Testing for Space Shuttle Orbiter Flow Measurement". In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1996. http://dx.doi.org/10.4271/961335.

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Cancelliere, Antonino, David J. Peres e Nunziarita Palazzolo. "Potential of Mean Daily Flows for Improving Peak Flow Quantiles Estimation". In World Environmental and Water Resources Congress 2018. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481400.045.

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Ku, Jentung, Theodore D. Swanson, Keith Herold e Kim Kolos. "Flow Visualization within a Capillary Evaporator". In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1993. http://dx.doi.org/10.4271/932236.

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Blackwell, C., e A. Zografos. "A One-Dimensional Flow Model for the Study of Crop Shoot Chamber Air Supply Flow Uniformity". In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1993. http://dx.doi.org/10.4271/932247.

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Berezneva, V. V., e V. V. Tatarinov. "Environmental data flow processing information factory". In XLIII ACADEMIC SPACE CONFERENCE: dedicated to the memory of academician S.P. Korolev and other outstanding Russian scientists – Pioneers of space exploration. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5133245.

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Rapporti di organizzazioni sul tema "Environmental flow"

McKay, S. Is mean discharge meaningless for environmental flow management? Engineer Research and Development Center (U.S.), settembre 2022. http://dx.doi.org/10.21079/11681/45381.

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Abstract (sommario):

River ecosystems are highly dependent on and responsive to hydrologic variability over multiple time scales (e.g., hours, months, years). Fluctuating river flows present a key challenge to river managers, who must weigh competing demands for freshwater. Environmental flow recommendations and regulations seek to provide management targets balancing socio-economic outcomes with maintenance of ecological integrity. Often, flow management targets are based on average river conditions over temporal windows such as days, months, or years. Here, three case studies of hydrologic variability are presented at each time scale, which demonstrate the potential pitfalls of mean-based environmental flow criteria. Each case study shows that the intent of the environmental flow target is not met when hydrologic variability is considered. While mean discharge is inadequate as a single-minded flow management target, the consequences of mean flow prescriptions can be avoided in environmental flow recommendations. Based on these case studies, a temporal hierarchy of environmental flow thresholds is proposed (e.g., an instantaneous flow target coupled with daily and monthly averages), which would improve the efficacy of these regulations.

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Paige, Karen S. Environmental Data Flow Six Sigma Process Improvement Savings Overview. Office of Scientific and Technical Information (OSTI), maggio 2015. http://dx.doi.org/10.2172/1182615.

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Sood, A., V. Smakhtin, N. Eriyagama, K. G. Villholth, N. Liyanage, Y. Wada, G. Ebrahim e C. Dickens. Global environmental flow information for the sustainable development goals. International Water Management Institute (IWMI), 2017. http://dx.doi.org/10.5337/2017.201.

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Sridharan, Kumar, e Mark Anderson. Corrosion in Supercritical carbon Dioxide: Materials, Environmental Purity, Surface Treatments, and Flow Issues. Office of Scientific and Technical Information (OSTI), dicembre 2013. http://dx.doi.org/10.2172/1111547.

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Rose, T. P., M. L. Davisson, G. B. Hudson e A. R. Varian. Environmental isotope investigation of groundwater flow in the Honey Lake Basin, California and Nevada. Office of Scientific and Technical Information (OSTI), luglio 1997. http://dx.doi.org/10.2172/620597.

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Sale, M. J., G. F. Cada, L. H. Chang, S. W. Christensen, S. F. Railsback, J. E. Francfort, B. N. Rinehart e G. L. Sommers. Environmental mitigation at hydroelectric projects: Volume 1. Current practices for instream flow needs, dissolved oxygen, and fish passage. Office of Scientific and Technical Information (OSTI), dicembre 1991. http://dx.doi.org/10.2172/1218135.

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Hugh I. Henderson, Jensen Zhang, James B. Cummings e Terry Brennan. Mitigating the Impacts of Uncontrolled Air Flow on Indoor Environmental Quality and Energy Demand in Non-Residential Buildings. Office of Scientific and Technical Information (OSTI), luglio 2006. http://dx.doi.org/10.2172/924486.

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Palmer, Carl D., Earl D. Mattson e Robert W. Smith. ANNUAL REPORT FOR ENVIRONMENTAL MANAGEMENT SCIENCE PROGRAM PROJECT NUMBER 86598 COUPLED FLOW AND REACTIVITY IN VARIABLY SATURATED POROUS MEDIA. Office of Scientific and Technical Information (OSTI), giugno 2003. http://dx.doi.org/10.2172/893223.

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