http://localhost:8080/xmlui/handle/123456789/1059 Sun, 26 Apr 2026 08:07:02 GMT 2026-04-26T08:07:02Z http://localhost:8080/xmlui/handle/123456789/3082 Title: Eutrophication assessment of a shallow lake using GIS Authors: Shiva Kumar, G.; Lakshmi Sruthi, P.; Rajasekha, P.; Karaer, Feza Abstract: Because of the rapidly increasing pollution in Lake Uluabat, which is one of the significant shallow lakes of Turkey and has been announced to be a Ramsar Area, eutrophic state evaluation based on geographic information system was performed. The eutrophication level of the lake is determined with the help of a 0 - 100 scale based on TSI calculations and secchi disc depth (SD), chlorophyll-a (ChI-a), total phosphorus (TP) and total nitrogen (TN) parameters. The TSI maps of four parameters were created using the Inverse Distance Weight (JDW) interpolation method. The final map showing the spatial distribution of trophic level was generated by synthesising the thematic maps of each indicator on the cell basis with the overlay technique. From the final map, the trophic level of the entire lake was characterized as eutrophic or more in all seasons studied during the year. Description: NITW Wed, 01 Jan 2014 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/3082 2014-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2939 Title: Fluid transients and wave propagation in pressurized conduits due to valve closure Authors: Nerella, Ruben; Rathnam, E.Venkata Abstract: Transient analysis of the pipe flow is often more important than the analysis of the steady state operating conditions that engineers normally use to withstand the additional loads resulting from instantaneous rapid valve closures. The flow rate and fluid pressures in the system may change from significantly high to an extremely low magnitude after some time interval of valve closure. These types of unsteady flows are frequently encountered in sudden closing of upstream valve of a turbine in hydroelectric power station. The governing equations of unsteady flows in closed conduits are partial differential equations of hyperbolic type. One simple numerical solution technique available in the literature is the method of characteristics (MOC). In the current paper, the MOC model is explained through one case study of valve closure. One bench mark problem of reservoir on upstream end and a valve on the downstream of pipeline end is demonstrated in this paper. Fluid pressure and flow rate variations in pipeline with respect to time after the valve closure are arrived from MOC model. It is observed that pressure head increased after development of first pressure wave which is due to instantaneous closure of the valve at the downstream end of the pipe. The pressure head and flow rates are not dampened but they were found to be oscillating by increasing and decreasing in the total simulation time which may be due to wave propagation time and consideration of series pipe of different diameters in the current study. Description: NITW Thu, 01 Jan 2015 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/2939 2015-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2905 Title: Development and implementation of NMEA interpreter for real time GPS data logging Authors: Shoab, Mohd; Jain, Kama; Anulhaq, M; Shashi, M Abstract: In Current Scenario GPS is very popular device among people for tracking and navigation purpose but GPS data can be used for several type of applications. This GPS data can be further used for analysis the trip, elevation profile etc. There are so many GPS data formats. Different GPS receivers support different formats. There are advantages and disadvantages of each GPS format. GPS provides many types information in various format like binary, rinex etc. NMEA is one of them. In this work we develop a NMEA interpreter for logging GPS data which contains several types of information like Latitude, longitude, Time, Speed, Elevation, PDOP etc. we develop this project in VB.Net. Description: NITW Tue, 01 Jan 2013 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/2905 2013-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2903 Title: HISTORICAL TREATISE OF SHORE DYNAMICS AND SPIT GROWTH NEAR KAKINADA COAST, GODAVARI DELTA, ANDHRA PRADESH Authors: Mruthyunjaya Reddy, K.; Deekshatulu, B.L. Abstract: India has 7517 km long coastline with major deltas on the east coast. Godavari delta is the 3rd largest, located in Andhra Pradesh, and it is familiar as rice bowl of the State. The presence of spit makes Kakinada a natural harbor. It is home for an anchorage port and a deep water port. Kakinada's deep-water port is the second largest in the state after Visakhapatnam port built in the year 1996.Hence its time sequential study is vital to understand the coastal processes and its environment. The study of multi-date remote sensing data and the historical maps revealed that during the period 1851-1893 the delta progradation is insignificant, but there was substantial growth from 1893-1957 to an extent of about 150 km2 at the rate of 1.66 km2 per year. For a period of 44 years i.e., from 1957-2001 the growth of the delta is marginal or almost stable. Again from 2001 onwards there is a steep growth in the delta development. There was a net increase of 178 km2 area from 1851-2008. The Kakinada spit growth was initially noticed during 1864 and maintained its present form since 1914 to date and forms a semienclosed water body, popularly known as Kakinada Bay. The spatial and temporal pattern of the spit lies in the North South direction, with little bulging and re-curvature towards in the Northwestern sector. Description: NITW Sat, 01 Jan 2011 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/2903 2011-01-01T00:00:00Z