Subject: average residence time of c. 90 days hydrol. Помогите перевести: average residence time of c. 90 daysКонтекст: Esthwaite Water (54 18¢N; 2 54¢W) covers an area of about 1 km2 has a mean depth of 6.9 m, a maximum depth of 16 m and an average residence time of c. 90 days. Заранее спасибо! |
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link 13.05.2014 12:38 |
Подозреваю, что это средний период полного обновления воды в озере. |
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link 13.05.2014 12:48 |
Погуглил. Возможно, дело немного сложнее. As rainfall determines the amount of water flowing into a given lake, the length of time water typically stays in a given lake, known as the residence time, may well also change in the future, at least for lakes with relatively short (say, less than 100 days) residence times. Есть еще такое определение: residence time: Tr = V/I [T], a measure of the average time a molecule of water spends in a reservoir. The residence time defined for steady-state systems is equal to the reservoir volume divided by the inflow or outflow rate. http://www.ldeo.columbia.edu/~martins/climate_water/lectures/hcycle.htm Еще см.: http://www.multitran.ru/c/m/l1=1&l2=2&s=residence+time |
время пребывания в водоеме |
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link 13.05.2014 12:59 |
Residence time Average residence time for water in the Lake = (lake volume)/(volumetric flow rate) = (37 km3)/(25 km3 year-1) = ~1.5 years. So, on average it takes about 1½ years for water to pass through the Lake. This is an interesting number in that the Lake probably completely overturns one or two times a year (in the spring and fall). Consequently, it is likely that all the water is replaced in the Lake over a period of a few years—it is unlikely that much of the bottom water in the Main Lake remains stagnant there for a long time. Likely, there is a difference between the residence times for the North and South Arms with the time being longer than average in the north and shorter in the south. The residence time for water in the West Arm is short, probably three or four days. |
Спасибо! Что-то вроде времени водообмена... |
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link 13.05.2014 13:06 |
наберите в гугле закавыченным поиском "время пребывания воды в водоеме" - откроется документ "Гидрологические факторы эвтрофирования" - там как раз и про водообмен, и про residence time прямо на первой странице |
Спасибо! |
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