PRODUCTION AND COLLECTION OF SEED OYSTERS 
215 
Table 4.— Temperature, velocity of the current, and salinity durinq flood tide in Wareham River, 
September 28, 1926 1 
Time 3 
Station II, channel 
Sta- 
tion I 
Station III 
Time 2 
Station II, channel 
Sta- 
tion I 
Station III 
Tem- 
per- 
ature, 
° C. 
(sur- 
face) 
Current 3 
Salin- 
ity, 
per 
mille 
(sur- 
face) 
Cur- 
rent 3 
(sur- 
face) 
Cur- 
rent 3 
(sur- 
face) 
Salin- 
ity, 
per 
mille 
(sur- 
face) 
Tem- 
per- 
ature, 
° C. 
(sur- 
face) 
Current 3 
Salin- 
ity, 
per 
mille 
(sur- 
face) 
Cur- 
rent 3 
(sur- 
face) 
Cur- 
rent 3 
(sur- 
face) 
Salin- 
ity, 
per 
mille. 
(sur- 
face) 
Sur- 
face 
Bot- 
tom 
Sur- 
face 
Bot- 
tom 
5.50 a. m 
17. 5 
3.0 
15.2 
28. 69 
28.91 
11.20 a. m 
17. 4 
15.2 
15. 2 
29. 78 
6. 1 
3.0 
29. 75 
fi.20 a. m 
17.5 
6. 1 
18.3 
28. 73 
0 
0 
28. 86 
11.50 a. m 
17.5 
24.4 
18.3 
29. 80 
6. 1 
3.0 
29. 96 
17. 5 
0 
12. 2 
28. 86 
0 
3. 0 
28. 87 
12.20 p. m 
18.0 
21. 3 
18. 3 
29. 85 
0 
3 0 
30.26 
7.20 a. m 
17.8 
18.3 
18.3 
28.84 
3.0 
0 
28. 87 
12.50 p. m 
18.0 
15.2 
9.1 
30. 04 
0 
0 
7.50 a m 
17.5 
18.3 
18.3 
28. 90 
3.0 
0 
28.71 
1.20 p. m 
17.6 
3.0 
3.0 
30. 07 
0 
0 
29.98 
17. 5 
6. 1 
12.2 
29. 33 
3. 0 
3. 0 
28. 82 
17.0 
15.2 
3. 0 
29. 74 
6. 1 
9. 1 
29 85 
17. 5 
6. 1 
12. 2 
29. 01 
6. 1 
6. 1 
29. 15 
17. 5 
12.2 
9. 1 
29. 69 
9. 1 
9. 1 
29 75 
17. 5 
18.3 
15. 2 
29. 51 
6. 1 
3.0 
29. 46 
17. 5 
21. 3 
18. 3 
29. 63 
6. 1 
9. 1 
29 61 
9.50 a. in 
17.5 
30.5 
24.4 
29. 46 
6. 1 
3.0 
29. 52 
3.20 p. m_. __ _ 
17. 5 
24.4 
18.3 
29. 60 
3.0 
6. 1 
29. 61 
10.20 a. m 
17.5 
12.2 
9.1 
29. 63 
6.1 
3.0 
29. 66 
3.50 p. m 
17.5 
29.43 
9. 1 
3.0 
29. 52 
1 Time of low water, 5.47 a. m.; high water at 1.02 p. in. Range of tide, 2.7 feet. 
2 Observations at Stations I and III were made 5 and 10 minutes, respectively, after time shown in column 1. 
3 Velocity of current is shown in centimeters per second. 
Table 5. — Velocity of the current and salinity of water during ebb tide in Wareham River, September 
22, 1926 1 
Time 2 
Station II, channel 
Sta- 
tion I 
Station III 
Time 2 
Station II, channel 
Sta- 
tion I 
Station III 
Current 3 
Salinity, per 
mille 
Cur- 
rent 3 
(sur- 
face) 
Cur- 
rent 3 
(sur- 
face) 
Salin- 
ity, 
per 
mille 
(sur- 
face) 
Current 3 
Salinity, per 
mille 
Cur- 
rent 3 
(sur- 
face) 
Cur- 
rent 3 
(sur- 
face) 
Salin- 
ity, 
per 
mille 
(sur- 
face) 
Sur- 
face 
Bot- 
tom 
Sur- 
face 
Bot- 
tom 
Sur- 
face 
Bot- 
tom 
Sur- 
face 
Bot- 
tom 
3.0 
30. 18 
62. 7 
45. 7 
29. 63 
15.2 
9. 1 
29. 75 
48.8 
33. 5 
29. 78 
6. 1 
6. 1 
30. 08 
62.7 
45.7 
29.45 
29. 34 
0 
3.0 
29. 98 
54. 9 
33. 5 
29.81 
30. 12 
12. 2 
12.2 
30. 01 
42. 7 
30. 5 
29. 36 
29. 36 
0 
29.81 
61. 0 
42. 7 
29. 80 
12. 2 
12. 2 
30. 10 
15. 2 
24.4 
29. 51 
61.0 
42. 7 
29. 70 
15.2 
12. 2 
29. 96 
2.20 p. m 
21. 3 
27.4 
29. 45 
11.50a. m 
62.7 
45.7 
29. 64 
29. 75 
15.2 
9.1 
29. 85 
1 Time of high water, 7.42 a. m.; low water at 1.38 p. m. Range of tide, 5.3 feet. 
2 Observations at Stations I and III were made 5 and 10 minutes, respectively, after the time shown in column 1. 
3 Current velocity is shown in centimeters per second. 
Hourly fluctuations in the salinity of water were studied on August 14 and 28, 
and September 22 and 28. The results of the observations presented in Tables 1, 2, 
4, and 5, and Figure 9, show that the maximum salinity occurs at the time of high 
water and that the salinity decreases with the receding tide. It is noteworthy that 
at Station II (fig. 9) there was a marked drop in salinity approximately 2 hours after 
the time of high water, followed by an increase in salinity at the time of low water. 
Similar changes, but occurring one hour later, were noticed at Station VIII (Table 1), 
located half a mile south of Station II. The sudden drop in salinity during ebb tide, 
followed by its sharp increase, can be explained by the influx of brackish waters from 
Broad Marsh River (fig. 1) wdiich at high tide are held in check by the heavier waters 
of Wareham River. As soon as the water in Wareham River during the receding 
tide reaches a certain level, the water from Broad Marsh River begins to flow, lowering 
the salinity at Stations II and VIII and temporarily impounding the saltier waters 
farther up the Wareham River. These conditions account for unusual fluctuations 
in salinities observed at Stations II and VIII. During the changes from low to high 
