graphic study of Willapa Bay since 1961. This study has been for the 

 purpose of establishing the general features of the water, for measuring 

 levels of primary productivity In the bay, and for determining the exchange 

 of water between Willapa Bay and the ocean. While Willapa Bay and Grays 

 Harbor are as similar as any two estuaries can be, we do recognize differ- 

 ences between them and do not consider Willapa Bay an identical control* 

 Data from five trips in Willapa Bay, carried out at almost the same time 

 as the Grays Harbor trips, were treated in the same manner as the Grays 

 Harbor data (Figure 1) . This information is presented In Figures 12 

 through 21. There Is no direct discharge of SWL Into Willapa Bay. The 

 SWL values shown In Figure 14 are primarily due to so-called "natural 

 background". It is, however, possible for minimal amounts of SWL to enter 

 Willapa Bay with the ocean feed water. 



In Willapa Bay relatively high chlorophyll A and high photosynthetic 

 rate values were found in Section II. The assimilation number shows a 

 relatively high photosynthetic efficiency and there was also considerably 

 more Inorganic phosphate pres-^nt in Section II of Willapa Bay (Figure 1). 

 In general these conditions observed in Section II are almost the opposite 

 of those observed in Section II of Grays Harbor. The conditions observed 

 in Willapa Bay seem typical of what has been found in many other estuaries, 

 with interrelationship between flushing, nutrients, and photosynthesis 

 resulting in a phtosjmthetic peak in the head of the estuary. 



Because of the presence of SWL, the Grays Harbor data were compared 

 with results from previous studies carried out in this laboratory (Westley 

 and Tarr, 1966), on determination of some effects of SWL on seawater using 

 ammonia base liquor in concentrations up to 128 ppm. From these laboratory 

 studies it appears that the levels of SWL observed In Grays Harbor were not 

 high enough to inhibit photosynthesis through direct toxicity. However, in 

 these laboratory studies it was observed that in the presence of SWL a 

 majority of the inorganic phosphate is converted to the organic form and 

 also that a fairly dense brown bloom develops in the water. Figures 6 and 7 

 Illustrate the low inorganic phosphate and the high total phosphate that 

 occurs in Section II of Grays Harbor and it appears that the SWL present is 

 affecting both water turbidity and inorganic phosphate content of the water. 



