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Water balance importance

If we start with hydrogen and oxygen, equilibrium is attained after most of the hydrogen and oxygen have united to form water. More important, though, the partial pressures at equilibrium are the same as those obtained beginning with pure H20. The equilibrium pressures are fixed by the temperature, the composition, and the total pressure they do not depend upon the direction from which equilibrium is approached. The balanced equation does not indicate the concentrations (or partial pressures) at equilibrium. [Pg.147]

The mineralocorticoids consist of aldosterone and des-oxycorticosterone and play an important role in conserving sodium and increasing die excretion of potassium. Because of diese activities, die mineralocorticoids are important in controlling salt and water balance Aldosterone is die more potent of these two hormones. Deficiencies of the mineralocorticoids result in a loss of sodium and water and a retention of potassium. [Pg.524]

To this point, direct human impacts on the hydrosphere have remained restricted to the regional scale. Although they can still be important, particularly in terms of water supply, these direct manipulations of the hydrologic cycle are unlikely to affect the global water balance significantly. However, this is not to suggest that the global water cycle is immune to human influence its close ties to other physical and... [Pg.129]

Fourth, body size is one of the major adaptations of any animal species. It affects all aspects of an animal s life including locomotion, diet, and reproduction. As such, it should also affect an animal s water balance due to such general considerations as the surface to volume ratio during heat production. Storage, and loss. Obviously, the average species body size is important in considering oxygen inputs and outputs. [Pg.123]

Data on weather conditions, especially temperature and rainfall (temporal distribution and intensity) in the study area are essential for the evaluation of the dissipation data. It is very important to understand the water balance in the paddy field as accurately as possible when calculating the rate of outflow. Records of changes in water temperature and sediment temperature are also helpful for modeling the behavior of a chemical in the rice paddy field. [Pg.897]

Please indicate which six of the following issues are the most important when considering the comfort and well-being of users and staff. (Air temperature, bacteria, chloramine levels in the water, chlorinous smells, clear water, fresh air, humidity, pH, residual disinfectant level, trihalomethanes, water temperature, water balance)... [Pg.139]

Regulation of volume and water balance is of critical importance to survival in sepsis therefore it is not surprising that multiple mechanisms exist to maintain normovolemia and adequate blood pressure. [Pg.97]

The ET cover cannot be tested at every landfill site so it is necessary to extrapolate the results from sites of known performance to specific landfill sites. The factors that affect the hydrologic design of ET covers encompass several scientific disciplines and there are numerous interactions between factors. As a consequence, a comprehensive computer model is needed to evaluate the ET cover for a site.48 The model should effectively incorporate soil, plant, and climate variables, and include their interactions and the resultant effect on hydrology and water balance. An important function of the model is to simulate the variability of performance in response to climate variability and to evaluate cover response to extreme events. Because the expected life of the cover is decades, possibly centuries, the model should be capable of estimating long-term performance. In addition to a complete water balance, the model should be capable of estimating long-term plant biomass production, need for fertilizer, wind and water erosion, and possible loss of primary plant nutrients from the ecosystem. [Pg.1064]

Surface runoff (Q) is the second-largest part of the hydrologic water balance for ET landfill covers at many sites in humid regions. Even at dry sites where surface runoff is small, errors in estimates of Q are important, and especially so if the model estimates significant Q on days with no runoff. Estimates of Q are therefore important to the design process at all sites. [Pg.1068]

Development of the Environmental Policy Integrated Climate (EPIC) model and its predecessor, the Erosion Productivity Impact Calculator, began in the early 1980s.69 70 The first version of EPIC was intended to evaluate the effects of wind and water erosion on plant growth and food production. More recent versions also evaluate factors important to other environmental issues. EPIC is a onedimensional model however, it can estimate lateral flow in soil layers at depth. All versions of EPIC estimate surface runoff, PET, AET, soil-water storage, and PRK below the root zone—these complete the hydrologic water balance for an ET landfill cover. [Pg.1075]

Owing to limitations on the water balance of the plant, a 40-50% conversion can be undertaken before a salt evaporator needs to be installed to remove excessive water. The feed brine for the membrane cellroom is taken from brine made from fresh imported salt and the weak brine is returned, combined with the diaphragm brine, restrengthened with recovered salt from the evaporators and fed to the diaphragm cells. The concentration of brine to the diaphragm cells could be weaker than normal, at around 270-280 g l-1 rather than 300-310 g l-1 to assist with the water balance. [Pg.205]

However, after implementing the water balance measurements, they were not able to observe a significant difference on the net water drag coefficient for a fuel cell with a cathode MPL and an anode without an MPL compared to a cell without any MPLs. It is important to note that they were able to observe that the MPL does in fact improve the fuel cell performance and stability when operating at constant conditions (i.e., the voltage fluctuations are significantly reduced when the cathode DL has an MPL). These results do not correlate with the observations presented earlier thus, more experimental work is necessary to investigate the process behind how the MPL helps the performance of the fuel cell. [Pg.239]

In addition, the models demonstrated that the water balance is important and can alter potential and reactant location. For example, the reaction distribution is closer to the channel than the rib near the inlet regions for humidified feeds. The reason is that, as the water moves from anode to cathode, there is more flooding, but the movement of water in this direction decreases along the channel because of lower current densities associated with lower oxygen... [Pg.476]

Abstract The elements of the water balance, namely precipitation, runoff, evapo-transpiration, and storage change, their interaction and special attributes in the mountains are presented using the example of the European Alps, with particular reference to Switzerland. Strong differentiation in the alpine climate over time and space exerts a significant influence on the water cycle. This chapter therefore discusses each of the elements of the water balance with particular reference to the influence of mountains and their measurement, as well as the spatial differentiation characteristics. The analysis of the water balance is accompanied by a discussion on the attributes and differences at different altimdes and in different climatic regions. Finally, the importance of alpine water resources for water supplies in the adjacent lowlands is examined. [Pg.17]

Water storage and changes in water storage are important elements in the water balance. Water storage provides a balanced supply of water for evapotranspiration and runoff over the short, medium, and long term. [Pg.46]

Yearly water balance time series since 1901 based on measured data have been established and analyzed by [23-25]. Recently, special importance has been attached to the fact that quantification of areal precipitation in mountainous environment remains a very difficult task. With the aim of achieving high spatial resolution, a specific methodology has been developed based on a comprehensive view of the water balance in different spatial and time scales [26]. [Pg.63]

For Switzerland the water balance has been established for the four most important river basins (Table 2) Rhine (27,970 km northern part), Rhone (5,220 km western inner Alpine part), Ticino (1,515 km southern part), and Inn (1,944 km eastern inner alpine region of Switzerland) and also for the entire territory of Switzerland (41,287 km ). [Pg.63]

Water Storage and Water Balance in [61] cited the ability of glaciers to deliver mnoff as an important influencing factor on mnoff characteristics in alpine... [Pg.87]

It has also become more evident that the loop of Henle is of major importance in the regulation of sodium and water balance, and in agreement with this, both frusemide (furosemide, fursemide, Lasilix, Lasix) and ethacrynic acid (XXIII... [Pg.37]

Quantitatively, proteins are the most important part of the soluble components of the blood plasma. With concentrations of between 60 and 80 g L they constitute approximately 4% of the body s total protein. Their tasks include transport, regulation of the water balance, hemostasis, and defense against pathogens. [Pg.276]

In the red blood cell this reaction plays an important role in COj transport from the tissues to the lungs. In the kidney, the protons of the H3O+ are exchanged for Na+ ions, which are reabsorbed, while HCO3 is decomposed through a shift of the equilibrium to the left. Carbonic anhydrase therefore plays a crucial role in maintaining the ion and water balance between the tissues and urine. [Pg.495]

The area of the brain enclosing the third ventricle is the diencephalon. This area consists of several important structures, including the thalamus and hypothalamus. The thalamus contains distinct nuclei that are crucial in the integration of certain types of sensations and their relay to other areas of the brain (such as the somatosensory cortex). The hypothalamus is involved in the control of diverse body functions including temperature control, appetite, water balance, and certain emotional reactions. The hypothalamus is also... [Pg.56]


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See also in sourсe #XX -- [ Pg.298 , Pg.299 , Pg.300 ]




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Water importance

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