نتایج جستجو برای: due to hydrometric stations
تعداد نتایج: 10620934 فیلتر نتایج به سال:
having conducted the experiment and analysed the data, the researcher computed the groups mean scores and variances for the test relating to the research question. as the final atep, a t-test was conodonted for the hypothesis. as noted earlier, the significance level was determined at .05 and .01 respectively. the observed t-value was higher than the critical t-value at. 5 and .01 levels. conse...
We have developed a high-resolution automatic sampling system for continuous in situ measurements of stable water isotopic composition and nitrogen solutes along with hydrological information. The system facilitates concurrent monitoring of a large number of water and nutrient fluxes (ground, surface, irrigation and rain water) in irrigated agriculture. For this purpose we couple an automatic s...
Electrical power of salinity gradient is one of the sources for renewable energy. This energy can be obtained by mixing two kinds of water with different concentrations. In a river estuary, fresh water naturally mixes with sea water without any obstruction. Reveres electro dialysis (RED) is one of the suitable and practical methods for controlling this unobstructed mixture and extracting energy...
The wandering reach of the lower Yellow River has undergone significant channel degradation since Xiaolangdi Reservoir operation, with a cumulative scour volume 14.1 × 108 m3 in 1999–2018, and severe resulted rapid incision this reach. annual river bed downcutting depths at section- reach-scales water stages low high flows were calculated to investigate characteristics quantitatively. results s...
Climatic change is affecting streamflow regimes of the permafrost region, altering mean and extreme conditions. In this study, we analyzed historical trends in annual flow (Qmean), minimum (Qmin), maximum (Qmax) Qmax timing across 84 hydrometric stations region Canada. Furthermore, related with temperature precipitation trends, used a multiple linear regression (MLR) framework to evaluate clima...
Flood as a rapid and destructive event causes great human and economic losses in Iran and around the world, annually. This study aimed to assess the temporal trend and spatial changes of flood coefficient of Ardabil Province rivers using daily discharge of 22 hydrometric stations over a 22-year (1991 to 2011) of recorded data. The flood coefficient amount was calculated after subtracting ...
Fixing the ecological flow in world's rivers contributes to preservation of river ecosystems and management water resources, related social economic aspects; It is volume necessary maintain a healthy ecosystem capable providing goods services. The hydrological method was first proposed estimate flow, developed 60s 70s 20th century. There are different methods such as: hydrological, hydraulic, e...
foreign policy takes root from complicated matters. however, this issue may be more truth about armenia. although the new government of armenia is less than 20 years, people of this territory are the first ones who officially accepted christianity. in very past times, these people were a part of great emperors like iran, rome, and byzantium.armenia is regarded as a nation with a privileged hist...
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