COWICHAN VALLEY REGIONAL DISTRICT
SOUTH COWICHAN WATER PLAN STUDY
V19830100 : Rev B : 11 February 2009
Page 69
Table 41 - Climate Change Water Balance with Regional Growth (2036)
Component
Jan Feb Mar
Apr
May Jun Jul
Aug Sept
Oct
Nov Dec Total
A. Shawnigan Watershed (1000 m
3
)
Surface Water Supply
Runoff / Inflow
19,000 17,900 19,000 9,230
2,660
0
0
0
0
0 9,230 23,500
101,000
Lake Evaporation
0
0
0
395
571 651
754
652
414
224
158
0
3,820
Surface Water Supply Balance 19,000 16,200 19,000 8,530
2,270 -650
-750
-650 -410
-220 9,050 23,500
94,900
Surface Water Licenses
Crop Irrigation
0
0
0
0
0
97
97
97
97
0
0
0
388
All Other Usage
656
656
656
656
656 853
853
853
853
656
656
656
8,660
Surface Water Demand Balance
656
656
656
656
656 950
950
950
950
656
656
656
9,040
Monthly Net Balance
18,400 17,300 18,300 8,170
1,430 -1,600 -1,700 -1,600 -1,400
-880 8,410 22,900
87,700
B. Saanich Inlet Watershed (1000 m
3
)
Surface Water Supply
Runoff / Inflow
10,400 9,800 10,400 5,050
1,450
0
0
0
0
0 5,050 12,900
55,000
Lake Evaporation
0
0
0
20
29
33
39
33
21
12
8
0
195
Surface Water Supply Balance 10,400 8,850 10,400 4,870
1,520
-33
-39
-33
-21
-11 5,030 12,900
53,800
Surface Water Licenses
Crop Irrigation
0
0
0
0
0
24
24
24
24
0
0
0
95
All Other Usage
590
590
590
590
590 767
767
767
767
590
590
590
7,790
Surface Water Demand Balance
590
590
590
590
590 790
790
790
790
590
590
590
7,880
Monthly Net Balance
9,830 9,210 9,790 4,440
835 -820
-830
-820 -810
-600 4,450 12,300
47,000
