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Raindrop Characteristics in the Pacific Northwest
- McCool, D.K., Williams, J.D., Morse, J.R.
- Paper 2009 no.097441
- rain, raindrop impact, rain intensity, rainfall energy, Washington, Oregon
- The U.S. Pacific Northwest, influenced by maritime air masses for most of the year, generally exhibits low rainfall intensities. The drop-size characteristics of such low-intensity storms are rarely studied. An investigation of natural drop sizes and their distribution was conducted at the Palouse Conservation Field Station near Pullman, WA and at Corvallis, OR. Data was collected from a number of storms by Ozalid paper technique. The distribution of drop sizes, intensity, and total calculated energy of these storms are presented and compared with data and relationships from studies in other areas of the U.S. This data has implications for rainfall simulator design and application of erosion models in areas with low-intensity rainfall that here-to-fore have relied on extrapolation of rainfall characteristics from higher precipitation areas for driving hydrologic and erosion models.