Hydrography of the Russian River Estuary - Sonoma County Water ...

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Figure 3.37. Estuary bathymetry from 10m x 10m grid. Segments used for salt balance calculations and associated CTD station locations are shown. The change in salinity during the September-October closure is shown Figure 3.38. In general the outer estuary loses salt and the inner estuary gains salt, resulting from the baroclinic forcing that moves excess salt from near the mouth and redistributes it so that isopycnals are level. The pivot point between decrease and increase in salinity is 5 km from the mouth, over a long shallow ridge between Willow Creek and Sheephouse Creek. The depth of strongest change is near the pycnocline depth, so that much of the observed change may be due to relaxation of the tilt in the halocline after closure. The increase in salinity observed in the outer estuary on 15 September is presumably a result of the wave overwash event between 12 and 14 September, with some of the intruding seawater mixing into the pycnocline and spreading landward at this depth. 56
Figure 3.38. Change in salinity from September 7. Units are psu. Also of interest is that the loss of bottom salinity is strongest near the mouth (vs Paddyʼs Rock) – indeed the salinity is lower here than at Paddyʼs Rock or Bridgehaven (see Figure 3.20) and it is warmer (Figure 3.22). This may reflect a local loss of saline waters as seepage through the sand barrier (and replacement by warmer, fresher overlying 57
Page 1 and 2:
HYDROGRAPHY OF THE RUSSIAN RIVER ES
Page 3 and 4:
Executive Summary Circulation, stra
Page 5 and 6: Table of Contents 1. Introduction .
Page 7 and 8: 1. Introduction The Russian River B
Page 9 and 10: The study was conducted from June t
Page 11 and 12: attached to each ADCP, and a third
Page 13 and 14: 3. Data Analysis The results from s
Page 15 and 16: existing SCWA-management protocol t
Page 17 and 18: 7. Loss to aquifers: This term quan
Page 19 and 20: Figure 3.7). A concurrent drop in e
Page 21 and 22: Histograms of the probability of fl
Page 23 and 24: Figure 3.8. Observed flow losses du
Page 25 and 26: easily over denser estuarine waters
Page 27 and 28: 3.2.2 - Current velocities at Heron
Page 29 and 30: Figure 3.14. Water levels (top pane
Page 31 and 32: This diurnal cycle in winds results
Page 33 and 34: Figure 3.18. Observed water levels
Page 35 and 36: All water properties are subject to
Page 37 and 38: 3.3.2 - Salt intrusion into inner e
Page 39 and 40: Figure 3.22. Water temperatures dur
Page 41 and 42: On closer inspection, one can see t
Page 43 and 44: Preliminary biochemical oxygen dema
Page 45 and 46: 3.4 - Stratification and water-colu
Page 47 and 48: Figure 3.29. Profiles of density, v
Page 49 and 50: diurnal variations during the sprin
Page 51: Using CTD profiles of ρ(z), time-s
Page 54 and 55: Figure 3.36. Decreasing bottom sali
Page 58 and 59: water) or it may reflect vertical m
Page 60 and 61: Figure 3.40. Nearshore wave height,
Page 62 and 63: Figure 3.41. Change in dissolved ox
Page 64 and 65: • Instrument precision The error
Page 66 and 67: Table 3.3. Error estimates for estu
Page 68 and 69: unaffected and remains resident for
Page 70 and 71: 5. Literature Reviewed Battalio, B.
Page 72: Simpson, J., J. Brown, J. Matthews,
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