Flow period

It is common practice to record the bottom hole pressure firstly during a flowing period (pressure drawdown test), and then during a shut-in period (pressure build-up test). During the flowing period, the FBHP is drawn down from the initial pressure, and when the well is subsequently shut in, the bottom hole pressure builds up. 

Solution flow period (several minutesli resin pump stopped (or by-passed)... 

Start of solution flow period-, resin pump reversed (or by-passed) i resin settles into reservoir... 

Flow equalization system A device or tank designed to hold back or store a portion of peak flows for release during low-flow periods. 

Some small cooling circuits have reversing refrigerant flow (i.e. cooling/ heat pump) and may work at reduced gas flow for capacity control. Under such conditions it may not be possible to maintain the minimum velocity to carry oil back to the compressor, and it will settle in the circuit. Arrangements must be made to increase or reverse the gas flow periodically to move this oil. 

Nabors, R. A. (1997). Trapping pollen collection of the honey bee Apis mellifera L. to determine pollen flow periods. Am. Bee J. 137, 215-216. 

Baking the polyester film at 200 C improved the planarity of the film profiles over the 20, 50 and 100 [Mi wide holes. These profiles were leveled better than those for the baked positive photoresist film. During baking, the polyester film shrinks less than the positive photoresist film and may also have either a lower viscosity and/or a longer, low viscosity flow period. 

However, changes in the seasonality of snowmelt coupled with shifts in precipitation patterns may result in water shortages in the summer and autumn, especially in downstream regions. For the River Rhine, for instance, some scenarios show a decrease in total discharge of more than 50% at the German-Dutch border for the low-flow period in the autumn [78]. Moreover, the declining impact of snow and ice melt will increase the year-to-year variability of discharge in the summer and autumn. 

Choosing the correct flow period is a very important aspect in the forming and shaping process. Mooney cure curves give good data on the flow period. The flow period also depends on the flow distances in the cavities of the mould and the viscosity of the rubber stock and the repeat pressure application cycles, called "bumping" cycles on the shop floor. 

Scorch time plays an important role in the reduction of moulding time as well as the thermal conductivity of the stock. Aluminium moulds are preferred, since aluminium is a better conductor of heat giving slightly shorter flow periods than steel moulds. 

The Suwannee River was sampled at its origin at the outlet of the Okefenokee Swamp. This fulvic acid, therefore, is likely to be less degraded than a sample from the Calcasieu River that was taken near its mouth on the estuary during a warm, low-flow period in early summer. Metal-ion solubility controls and sorption on mineral surfaces in upland soils also might fractionate the fulvic acid in the Calcasieu River. In contrast, the Suwannee River mineral-soil solubility controls are less significant. 

Figure 10.20 Conceptual model N cycling in the Brunswick estuary (Australia) based on budget modeling scenarios for different flow periods throughout the year. (Modified from Ferguson et al., 2004.)...

At the end of the stop-flow period in which the particle clouds reach equilibrium, flow is resumed and the particles are displaced downstream. The displacement velocity is characterized by the dimensionless retention ratio R, which is described by the equation... 

The boundaries of a river mouth area are defined by the intense manifestation of mouth processes (Fig. 1). The river boundary of a mouth area or the head of a mouth area are defined either by a maximum propagation distance of water level fluctuations of marine origin (tides, storm surges) into a river during low-flow period or by the point, where the river channel is divided into delta branches (a delta head or a delta apex), if water level fluctuations of marine origin do not reach this point. In the first case, there is a part of the river mouth reach above the delta head (or a near-delta reach) between the river boundary of the mouth area and the delta head. In the second case, these two components coincide. The first principle of defining the upper boundary of a river mouth area is usually applicable to river mouths with small deltas or... 

The sea boundary of a river mouth area or the outer boundary of an open nearshore zone of a river mouth is defined by a maximum propagation distance of the outer (marine) part of the frontal zone into the sea, when river and sea waters are mixed in the surface layer. This boundary is arbitrarily defined by the location of the isohaline equalling about 90% of water salinity in the adjacent part of the sea at the river high-flow period. 

The majority of very small and small rivers have similar type mouths. They have, as a rule, a single channel, which can be blocked during low-flow period by coastal bars or spits composed of sand or pebble. Only several rivers of these categories have in their mouths small coastal water bodies similar to lagoons or limans and belong to the II type (semi-enclosed mouths without deltas). Mouths of this kind can be found in very low and flat coastal plains along the southwestern and northwestern parts of the Black Sea and the northern part of the Sea of Azov. 

The following periods in seasonal regime of the Danube River can be distinguished [8] high-flow period (spring-summer rainfall and snow melt... 

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