| snippet:
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This layer provides spatially dependent rainfall depths in inches for the 10- and 100-year recurrence intervals of durations ranging between 15 minutes and 48 hours and is typically used in flood studies for Marin County. The data is provided in a 1.5 by 1.9 km gird, expanding across the entire County, allowing for depths to be queried using geographic coordinates |
| summary:
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This layer provides spatially dependent rainfall depths in inches for the 10- and 100-year recurrence intervals of durations ranging between 15 minutes and 48 hours and is typically used in flood studies for Marin County. The data is provided in a 1.5 by 1.9 km gird, expanding across the entire County, allowing for depths to be queried using geographic coordinates |
| extent:
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[[-123.045271246908,37.7901727577109],[-122.414559322138,38.3422568151568]] |
| accessInformation:
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Data provided courtesy of Valley Water for San Francisco Bay. |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Map Service","Service"] |
| description:
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<div style='text-align:Left;'><div><div><p><span style='font-size:12pt'>This layer provides rainfall depths in inches for the 10 and 100 recurrence interval over a range of durations from 15-minutes to 48-hours to be used when performing hydrological calculations within the unincorporated parts of Marin County, and possibly in incorporated areas where specifically approved by the City or Town. These values were statistically derived using precipitation gages across the entire San Francisco Bay Area by Met-Stat for Valley Water (2016) as an alternative to the values presented in NOAA Atlas 14. Analysis by Valley Water for the South Bay as well as by Wood Rodgers in 2025 for Marin County showed runoff from calibrated hydrologic models better matched historical flow frequencies using Met-Stat depths than NOAA Atlas 14 depths. Note that it is likely the Met Stat values will be replaced by the newer NOAA Atlas 15 values when publicly released in 2028 (estimated date by NOAA) per NOAA (https://water.noaa.gov/about/atlas15). Users of this data should always check the webpage for the latest information on updates to Marin County hydrology.</span></p></div></div></div> |
| licenseInfo:
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<div style='text-align:Left;'><div><div><p><span style='font-size:12pt'>County of Marin makes no representation or warranties, express or implied, with respect to the use or reuse of the data provided herewith, regardless of its format or the means of its transmission. THE DATA IS PROVIDED 'AS IS' WITH NO GUARANTEE OR REPRESENTATION ABOUT THE ACCURACY, CURRENCY, SUITABILITY, PERFORMANCE, MERCHANTABILITY, RELIABILITY, OR FITNESS OF THE DATA FOR ANY PARTICULAR PURPOSE. Most data, especially parcels and administrative boundaries, are not survey precise. County of Marin shall not be liable for any direct, indirect, special, incidental, compensatory or consequential damages or third-party claims resulting from the use of this data, even if County of Marin has been advised of the possibility of such potential loss or damage. This data may not be used in states that do not allow the exclusion or limitation of incidental or consequential damages.</span></p></div></div></div> |
| catalogPath:
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|
| title:
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MARIN_HYDROLOGY_FLOOD_RAINFALL_DEPTH_10YR_100YR |
| type:
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Map Service |
| url:
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|
| tags:
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["Environment","Climate and Weather","Water - Inland","Polygon"] |
| culture:
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en-US |
| portalUrl:
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| name:
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MARIN_HYDROLOGY_FLOOD_RAINFALL_DEPTH_10YR_100YR |
| guid:
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EE1C2F54-1B46-4A46-8C82-E155FA201A94 |
| minScale:
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0 |
| spatialReference:
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NAD_1983_HARN_StatePlane_California_III_FIPS_0403_Feet |