| 摘要 |
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.
|
