Qualla: Where Salt and Fresh Water Negotiate

Where Salt and Fresh Water Negotiate: Introduction

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit UnifiedFunctionality, CC BY-SA 4.0. Juvenile salmon reared in the Suisun Marsh grow twice as fast as those raised in the upper watershed. This single fact — documented by state fisheries monitoring — explains why 80 percent of California's commercial salmon fishery depends on a tidal wetland that most Californians have never heard of. Stretching across 116,000 acres between the Sacramento-San Joaquin Delta and San Francisco Bay, Suisun Marsh is the largest brackish water marsh on the west coast of the United States. Named for the Suisunes, a Patwin sub-tribe who inhabited the area, it is a landscape shaped by the collision of salt water pushing inland from Grizzly Bay and freshwater draining from the Sierra Nevada — a collision that humans have spent the last 150 years trying to control.

Image: UnifiedFunctionality | CC BY-SA 4.0

Where Salt and Fresh Water Negotiate: Built by Rivers, Undone by Salt

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit California Department of Fish and Wildlife from Sacramento, CA, USA, CC BY 2.0. The marsh is geologically young, assembled over thousands of years as the Sacramento and San Joaquin Rivers carried sediment from the Sierra Nevada and the Vaca Mountains into the shallow margins of San Francisco Bay. The result is a patchwork of peat soils, tidal channels, and s...

Image: California Department of Fish and Wildlife from Sacramento, CA, USA | CC BY 2.0

Where Salt and Fresh Water Negotiate: 158 Duck Clubs and a Herd of Elk

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit UnifiedFunctionality, CC BY-SA 4.0. When farming failed, the marsh found a new economy. By about 1930, waterfowl hunting had become the primary use of the land, and it remains dominant today — 158 private duck clubs operate within the marsh alongside large public hunting areas. The managed wetlands are flooded to a...

Image: UnifiedFunctionality | CC BY-SA 4.0

Where Salt and Fresh Water Negotiate: The Gates That Guard the Drinking Water

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Pacific Southwest Region USFWS from Sacramento, US, Public domain. Beneath the pastoral surface lies an engineering puzzle with enormous stakes. The construction of the Central Valley Project and the California State Water Project altered the marsh's natural salinity regime, pushing saltier water deeper into the system. This was more than an eco...

Image: Pacific Southwest Region USFWS from Sacramento, US | Public domain

Where Salt and Fresh Water Negotiate: The People Who Were Here First

Thu, 02 Apr 2026 00:00:00 GMT

Photo credit Public domain. At Rush Ranch, a 2,070-acre remnant of tidal marsh acquired by the Solano Land Trust in 1988, volunteers run an educational program for elementary school students on a recreated Patwin village. The Suisunes — the Patwin sub-tribe for whom the marsh is named — thrived here for gen...

Image: Public domain