نتایج جستجو برای: daily and monthly scales
تعداد نتایج: 16847680 فیلتر نتایج به سال:
abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...
Scaling aspects of river flow routing are studied by comparing two flow routing schemes, one designed for use in coupled general circulation models (GCMs) and operated at large spatial scales (3⁄4350 km), and the other designed for use in typical hydrological applications at small spatial scales (3⁄425 km). The same runoff data are used as input into the two routing schemes, and comparisons are...
Abstract. Subseasonal streamflow forecasts inform a multitude of water management decisions, from early flood warning to reservoir operation. Seamless forecasts, i.e. that are reliable and sharp over range lead times (1–30 d) aggregation timescales (e.g. daily monthly) clear practical interest. However, existing forecast products often non-seamless, developed applied for single timescale time 1...
The streamflow and water level complexity of the Poyang Lake basin has been investigated over multiple time-scales using daily observations of the water level and streamflow spanning from 1954 through 2013. The composite multiscale sample entropy was applied to measure the complexity and the Mann-Kendall algorithm was applied to detect the temporal changes in the complexity. The results show th...
Objectives Using Canadian mortality data from 1974 to 1995, this article examines seasonal and daily patterns of death by cause. Data source Death records were extracted from the Canadian Vital Statistics Data Base, which is compiled from information provided to Statistics Canada by the Vital Statistics Registries in each province and territory. Analytical techniques Components of the time seri...
During the past few decades, the southern part of the Caspian Sea has more frequently experienced extreme climatic events such as drought and flood. Trend analysis of hydro-climatic variables was conducted using non-parametric Mann-Kendall test and regression test for Neka basin in the north of Iran. Trends of precipitation and stream flow characteristics including maximum flow, mean flow...
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