Bay Delta Boundaries

Fig. 3 Open Boundaries to the Bay Delta SCHISM model with indices corresponding to the bctides.in file order, which is how SCHISM then indexes those boundaries

Generally speaking, all inflows have negative signs in flux.th and all outflows have positive signs. See table for references to input files and descriptions of the boundaries. Note that the ocean boundary is a special case, as it has both elevation and velocity inputs in the baroclinic mode, and the velocity inputs are derived from a barotropic warmup run. See Ocean Boundary Stabilization: Barotropic Warmup (uv3D.th.nc) for more details on that process.

Table 3 Bay-Delta SCHISM Open Boundaries

Index	Boundary Name	Type	Sign in File	Input File	Description
0	ocean	elevation (and velocity in baroclinic mode)	Up is Positive	elev2d.th.nc (and uv3d.th.nc in baroclinic mode)	Ocean tidal inputs derived from Point Reyes and Monterey tidal stations
1	coyote	flow	Negative	flux.th	Coyote Creek just north of Milpitas
2	ccc_rock_slough	flow	Positive	flux.th	Exports taken by Contra Costa Water District (CCWD) at Rock Slough Intake
3	ccc_old	flow	Positive	flux.th	Exports taken by CCWD at Old River Intake
4	swp	flow	Positive	flux.th	Exports taken by State Water Project (SWP) at Banks Pumping Plant
5	cvp	flow	Positive	flux.th	Exports taken by Central Valley Project (CVP) at Jones Pumping Plant
6	calaveras	flow	Negative	flux.th	Calaveras River in Stockton just East of Interstate 5
7	sjr	flow	Negative	flux.th	San Joaquin River at Vernalis, just downstream of confluence with Stanislaus River
8	mokelumne	flow	Negative	flux.th	Mokelumne River downstream of confluence with Cosumnes River
9	american	flow	Negative	flux.th	American River near Watte Ave bridge
10	sacramento	flow	Negative	flux.th	Sacramento River flow above Verona, includes interpolated flow from Feather River
11	yolo_toedrain	flow	Negative	flux.th	Flow into the Toe Drain of the Yolo Bypass, upstream of the Lisbon Weir
12	yolo	flow	Negative	flux.th	Flood flows from Yolo Bypass, includes Putah Creek, Willow Slough, Cache Creek, and flows from Sacramento River from Knights Landing Ridge Cut as well as from overtopping Fremont and Sacramento Weirs
13	north_bay	flow	Positive	flux.th	Exports through the North Bay Aqueduct Intake at Barker Slough
14	ccc_victoria	flow	Positive	flux.th	Exports taken by CCWD from Victoria Canal (Middle River Pump Station)