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Upper Santa Clara Valley

Ecoregion in Coast Ranges, CA

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The Upper Santa Clara Valley ecoregion is a low-relief alluvial plain in the upper Santa Clara Valley, including the San Benito Valley. It retains more agricultural land and is not as urbanized as the Bay Terraces/Lower Santa Clara Valley ecoregion (6t). Late Quaternary alluvium is predominant. Soil temperature regimes are thermic and soil moisture regimes are xeric. Common vegetation series include valley oak, coast live oak, California oatgrass, and needlegrass grasslands, but most of the region is in cropland or urban and residential land. Runoff is slow across the alluvial plain. All but the larger streams are dry through most of the summer.

— EPA

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Ecoregion