Table 23-4. Total Nutrient Budget for the Southeast Sector 
(+ is in) (thousands of moles/day) 
Process 
Sediment 
Nutrient Sewage Streams Advection Release Fallout 
Fixed inorg. N 
+15.8 
+2.0 
-0.6 
+14.4 
0.0 
Dissolved org. N 
+13.5 
+1.0 
-3.6 
0.0(3) 
0.0 
Particulate N 
+ 1.2(1) 
+1.2(2) 
-4.5 
0.0(4) 
-40.4 
Total N 
+30.5 
+4.2 
-8.7 
+14.4 
-40.4 
Inorg. P 
+ 2.5 
+0.2 
-1.0 
+ 0.8 
0.0 
Dissolved org. P 
+ 0.7 
+0.1 
-0.3 
0.0 
0.0 
Particulate P 
+ 0.1 
+0.1 
-0.5(5) 
0.9 
- 2.8 
Total P 
+ 3.4 
+0.4 
-1.8 
+ 0.8 
- 2.8 
(1) Particulate N & P calculated as follows. Steinhilper (9) gives sewage Part. 
N « 1 g/m^; flow is 18 x 1(P m^/day; assume N:P= 10:1. 
(2) Particulate N & P in streams from stream carbon by Steinhilper (9), plus 
assumption of C:N:P= 100:1 5:1.5. 
(3) Our limited data plus Hartwig's (5) data show dissolved org. N and P 
flux from sediment is small. 
(4) Sediment resuspension of organic material excluded from calculation. 
(5) Assume particulate N:P= 10:1. 
The lagoon sediments are the repository for most of the “new,” or 
terrigenous, nutrients which have been delivered to the southeast sector of 
Kaneohe Bay. There is a substantial cycling of nutrients between that 
repository and the water column, with surprisingly little loss (especially of 
nitrogen). This situation has been recognized on the basis of a water-column 
nutrient budget. We do not yet have enough sediment nutrient data to establish 
a quantitatively defensible sediment nutrient budget, but the nutrient level in 
the sediment lends qualitative support to the assertion. 
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