| 摘要 |
<p>Disclosed is a runoff rain gauge (100) which includes a collector tube (104), soil infiltration resistance medium (108), a runoff resistance flow element (113), a standard rain gauge (102), and runoff collection tube (114). Precipitation enters the collector tube (104) and is divided to flow into the infiltration medium (108) and runoff collection tube (114) via flow element (113). Total precipitation is read in standard rain gauge (102), runoff in tube (114), and soil infiltration in medium (108) is calculated by the difference between total precipitation and the runoff. Also disclosed are a runoff rain gauge (100) comprising: a seal leg (150) downstream from the runoff resistance flow element (113); a collector tube (104) mounted directly to the ground so that the bottom of the soil infiltration resistance medium 108 contacts the ground surface; and/or a horizontal capillary tube in the runoff resistance flow element (113) to insure self-sealing via capillary forces.</p> |
