ASSESSMENT OF ANNUAL AVERAGE TURBIDITY IN A RIVER SECTION USING EMPIRICAL RELATIONSHIPS BASED ON GIS TECHNIQUES

2013 ◽  
Vol 12 (4) ◽  
pp. 751-756
Author(s):  
Ioan Craciun ◽  
Tomi Hraniciuc ◽  
Ilinca Dinu
Keyword(s):  
River Section ◽  
Empirical Relationships ◽  
Annual Average ◽  
Gis Techniques

scholarly journals GIS TECHNIQUES FOR MAPPING OF WIND SPEED OVER IRAQ

2019 ◽  
Vol 50 (6) ◽  
Author(s):  
Adeeb & Al-Timimi
Keyword(s):  
Wind Speed ◽  
Kendall Test ◽  
Northern Region ◽  
Annual Average ◽  
Wind Speeds ◽  
Gis Techniques ◽  
Mean Wind Speed ◽  
Seasonal Wind ◽  
Autumn And Winter ◽  
Climate Studies

This study was aimed to use GIS techniques in climate studies. Analysis of monthly wind speed data for the period 1981 to 2017, and mapping of monthly, seasonal and annual wind speed in Iraq has been investigated in this study. The area of study was divided into three regions. the results of  Mann Kendall test of the middle and southern region reveal a significant decreasing trend in the months of the summer season. While positive trends of mean wind speed were found in the northern region for the whole period. Wind speed value reaches its highest value in (Jun and July), and the lowest value of wind speed was in December.  Seasonal wind speeds show the highest values recorded in the summer and spring seasons and the lowest in the autumn and winter seasons. Wind speed maps were obtained using IDW techniques in G I S, the results show that the annual average of wind speed in the northern, middle and southern regions was 2.7 m/s, 3.6 m/s and 4.1 m/s respectively. While the annual average of wind speed in the study area "Iraq" was 3.6 m/s. The winds were low in the northern region compared to the middle and southern regions. The wind speed maps show the appropriate sites for the installation of wind turbines.

Comparison of an Ecological Model of Lake Ontario and Phosphorus Loading Models

1977 ◽  
Vol 34 (2) ◽  
pp. 286-290 ◽  
Author(s):  
Donald Scavia ◽  
Steven C. Chapra
Keyword(s):  
Chlorophyll A ◽  
Total Phosphorus ◽  
Ecological Model ◽  
Lake Ontario ◽  
Phosphorus Loading ◽  
Empirical Relationships ◽  
Annual Average ◽  
Phosphorus Loads

Predicted responses of Lake Ontario to phosphorus loads from two empirical relationships and an ecological model were compared. Predictions of annual average concentrations of total phosphorus and chlorophyll a by the ecological model were consistent with those predicted by the simpler models. We concluded that the use of a particular type of model is governed by the nature of the problems being addressed rather than an inherent superiority of either approach.

Phytoepiphyton of the Main Riverbed of the River Section of the Kanev Reservoir

2017 ◽  
Vol 53 (6) ◽  
pp. 26-36 ◽  
Author(s):  
P. D. Klochenko ◽  
T. F. Shevchenko ◽  
O. S. Tarashchuk
Keyword(s):  
River Section

Seasonal and Interannual Dynamics of Phytoplankton, Phytomicroepiphyton, and Nutrients Content in the River Section of the Kanev Reservoir

2016 ◽  
Vol 52 (1) ◽  
pp. 49-61 ◽  
Author(s):  
V. I. Shcherbak ◽  
V. M. Yakushin ◽  
A. M. Zadorozhnaya ◽  
N. Ye. Semenyuk ◽  
M. I. Linchuk
Keyword(s):  
River Section ◽  
Seasonal And Interannual Dynamics ◽  
Interannual Dynamics

Simulation Model of the Dynamic Behavior of a Tire Running Over an Obstacle

1988 ◽  
Vol 16 (2) ◽  
pp. 62-77 ◽  
Author(s):  
P. Bandel ◽  
C. Monguzzi
Keyword(s):  
Simulation Model ◽  
Dynamic Behavior ◽  
Black Box ◽  
Box Model ◽  
Vehicle Suspension ◽  
Empirical Relationships ◽  
Static Tests ◽  
High Speeds ◽  
Dynamic Forces ◽  
Vehicle Suspension System

Abstract A “black box” model is described for simulating the dynamic forces transmitted to the vehicle hub by a tire running over an obstacle at high speeds. The tire is reduced to a damped one-degree-of-freedom oscillating system. The five parameters required can be obtained from a test at a given speed. The model input is composed of a series of empirical relationships between the obstacle dimensions and the displacement of the oscillating system. These relationships can be derived from a small number of static tests or by means of static models of the tire itself. The model can constitute the first part of a broader model for description of the tire and vehicle suspension system, as well as indicating the influence of tire parameters on dynamic behavior at low and medium frequencies (0–150 Hz).

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