Bathymetric survey of Lake Naivasha and its satellite Lake Oloiden in Kenya; using acoustic profiling system

2018 ◽  
Vol 23 (4) ◽  
pp. 324-332 ◽  
Author(s):  
Caroline W. Maina ◽  
Joseph K. Sang ◽  
Benedict M. Mutua ◽  
James M. Raude
Keyword(s):  
Lake Naivasha ◽  
Bathymetric Survey ◽  
Acoustic Profiling

Resonant acoustic profiling for biological detection and diagnostics

2008 ◽  
Author(s):  
W. Chiu ◽  
C.J. Hammond ◽  
R. Hammond ◽  
L. Harding ◽  
E. Hawkins ◽  
...  
Keyword(s):  
Biological Detection ◽  
Acoustic Profiling

Population characteristics of Oreochromis niloticus (Linnaeus, 1758) in light of varying water quality conditions of adjoined Lakes Naivasha and Oloidien in Kenya

2020 ◽  
Vol 01 (01) ◽  
pp. 54-71
Author(s):  
Alice Mutie ◽  
◽  
Edna Waithaka ◽  
George Morara ◽  
Priscilla Boera ◽  
...  
Keyword(s):  
Water Quality ◽  
Oreochromis Niloticus ◽  
Quality Parameters ◽  
Population Characteristics ◽  
Lake Naivasha ◽  
Habitat Conditions ◽  
Relationship Analysis ◽  
Relative Condition Factor ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Main Lake

Nile tilapia Oreochromis niloticus (L.) is a recent re-introduction in Lake Naivasha and is one of the fish species that has crossed into Lake Oloidien. This study assessed and compared the population characteristic of O. niloticus under different physicochemical conditions of water in L. Naivasha (main) and L. Oloidien. Samples of water for selected water quality parameters and fisheries data from catch survey were collected between 2017 and 2018. Results indicate the highest conductivity levels recorded in 2018 as 2916 ±11.30 µScm-1 and 282.33 ± 4.33 µScm-1 for L. Oloidien and L. Naivasha respectively. Mean total lengths of O. niloticus were 19.1± 1.8 cm and 23.6 ± 2.9 cm for L. Oloidien and L. Naivasha respectively. Mean weight of O. niloticus was 129.3 ± 37.8 g in L. Oloidien and 260.9 ± 81.0 g in L. Naivasha. Length-weight relationship analysis showed a negative allometric growth (b = 2.526) and (b = 2.983; p > 0.05) in lakes Oloidien and Naivasha respectively. The relative condition factor (Kn) values were slightly lower in O. niloticus from L. Oloidien compared to the main Lake. Differences between the two lakes in the population characteristics of O. niloticus may be attributed to the observed differences in the habitat conditions, including the conductivity and pH levels.

Structural Analysis and Optimization of Hybrid Unmanned Amphibian Aerial Vehicle

2021 ◽  
Vol 13 (2) ◽  
Author(s):  
C. Gajendran ◽  
M.K. Padmanabhan ◽  
M. Dinesh ◽  
S. Vignesh ◽  
S. Rajesh ◽  
...  
Keyword(s):  
Water Quality ◽  
Structural Analysis ◽  
Water Quality Management ◽  
Bathymetric Survey ◽  
Operational Conditions ◽  
Remote Locations ◽  
Hydrographic Survey ◽  
Aerial Vehicle ◽  
Unmanned System ◽  
Related Application

Hybrid Unmanned Amphibian Aerial Vehicle (HUAAV) is a hybrid unmanned system consisting of a multi-rotor and a hovercraft. Water quality management, hydrographic survey, bathymetric survey and related application areas still employs time consuming and erroneous traditional methods of using boats to access the test sites. The application of unmanned systems will significantly increase the efficiency of this process by getting access to remote locations of both air and water. This paper deals with the design optimization and finite element structural analysis to validate the structural capability of the hybrid amphibian aerial vehicle for operational conditions. The Reserve Factors (RF) for all the components in the amphibian aerial vehicle are calculated and then optimized.

Acoustic profiling of suspended sediments in the marine bottom boundary layer

1982 ◽  
Vol 9 (3) ◽  
pp. 175-178 ◽  
Author(s):  
Robert A. Young ◽  
John T. Merrill ◽  
Thomas L. Clarke ◽  
John R. Proni
Keyword(s):  
Boundary Layer ◽  
Suspended Sediments ◽  
Bottom Boundary Layer ◽  
Bottom Boundary ◽  
Acoustic Profiling
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