Long-term Trends in Spring and Summer-flooded Wetland area in Suisun Marsh, California

We digitized water on the landscape for breeding waterfowl and other wetland-associated species within Suisun Marsh (California, USA) twice each year (spring and summer) during a 38-year period (1984-2021) with remote sensing methods that combined Landsat satellite imagery (composite images) and spectral mixture analysis using Google Earth Engine. This dataset contains the amount of flooded wetland area twice each year (spring and summer) at four spatial extents within Suisun Marsh along with corresponding data on precipitation, freshwater outflow from the Sacramento and San Joaquin River Delta, and the water year classification for the Sacramento River hydrological basin.