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| This gravel bar and dry stream channel of Chalone Creek is on the east side of Pinnacles National Park (below a new bridge). The valley of Chalone Creek and its tributaries have a high potential for flood and debris flow hazards from infrequent heavy rain periods in the region (Meyer, 1995). In 1998 heavy rains resulted in debris flows that destroyed a park bridge and spread gravels throughout the valley. Note how fresh gravel from the debris flow is spread across the valley, and only a small sandy channel has formed in the years subsequent to the major flood. The 1998 flood and debris flow possibly contributed to the death of these trees. (This photo was taken in 2003.) |
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