scholarly journals Long-term variations of three types of phosphorus concentrations in highly eutrophic shallow Lake Kasumigaura, with special reference to dissolved organic phosphorus.

1987 ◽  
Vol 48 ◽  
pp. 1-11 ◽  
Author(s):  
Akira OTSUKI ◽  
Morihiro AIZAKI ◽  
Takayoshi KAWAI
1998 ◽  
Vol 43 (3) ◽  
pp. 471-480 ◽  
Author(s):  
Motoo Utsumi ◽  
Yukihiro Nojiri ◽  
Takeshi Nakamura ◽  
Nozawa Takeshi ◽  
Akira Otsuki ◽  
...  

1988 ◽  
Vol 20 (6-7) ◽  
pp. 263-270 ◽  
Author(s):  
K. Otsubo ◽  
K. Muraoka

The dispersion and resuspension of sediments in Takahamairi Bay basin of Lake Kasumigaura were studied by means of field research and numerical simulation. The field data on wind direction and velocity, lake current, water wave, and turbidity were shown. Based on these results, we discuss how precipitated sediments were resuspended in this shallow lake. To predict the turbidity and the depth of bed erosion, a simulation model was established for this lake. The calculated turbidity showed good agreement with the field data. According to the simulated results, the turbidity reaches 200 ppm, and the bed is eroded several millimeters deep when the wind velocity exceeds 12 m/s in the lake.


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