DOI: 10.5194/hess-21-5263-2017
Scopus记录号: 2-s2.0-85031915061
论文题名: Measuring precipitation with a geolysimeter
作者: Smith C ; D ; , Van Der Kamp G ; , Arnold L ; , Schmidt R
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 10 起始页码: 5263
结束页码: 5272
语种: 英语
Scopus关键词: Gages
; Groundwater
; Meteorological instruments
; Rain
; Snow
; Conventional precipitation
; Correlation coefficient
; Groundwater pressure
; Precipitation events
; Precipitation gauge measurement
; Precipitation gauges
; Solid precipitation
; World meteorological organizations
; Precipitation (meteorology)
; evapotranspiration
; groundwater
; lysimeter
; measurement method
; precipitation (climatology)
; precipitation assessment
; raingauge
; snow
; Canada
; Saskatchewan
英文摘要: Using the relationship between measured groundwater pressures in deep observation wells and total surface loading, a geological weighing lysimeter (geolysimeter) has the capability of measuring precipitation event totals independently of conventional precipitation gauge observations. Correlations between groundwater pressure change and event precipitation were observed at a co-located site near Duck Lake, SK, over a multi-year and multi-season period. Correlation coefficients (r2) varied from 0.99 for rainfall to 0.94 for snowfall. The geolysimeter was shown to underestimate rainfall by 7 % while overestimating snowfall by 9 % as compared to the unadjusted gauge precipitation. It is speculated that the underestimation of rainfall is due to unmeasured run-off and evapotranspiration within the response area of the geolysimeter during larger rainfall events, while the overestimation of snow is at least partially due to the systematic undercatch common to most precipitation gauges due to wind. Using recently developed transfer functions from the World Meteorological Organization's (WMO) Solid Precipitation Intercomparison Experiment (SPICE), bias adjustments were applied to the Alter-shielded, Geonor T-200B precipitation gauge measurements of snowfall to mitigate wind-induced errors. The bias between the gauge and geolysimeter measurements was reduced to 3 %. This suggests that the geolysimeter is capable of accurately measuring solid precipitation and can be used as an independent and representative reference of true precipitation. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79022
Appears in Collections: 气候变化事实与影响
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作者单位: Environment and Climate Change Canada, Climate Research Division, Saskatoon, Canada; Environment and Climate Change Canada, Watershed Hydrology and Ecology Research Division, Saskatoon, Canada
Recommended Citation:
Smith C,D,, Van Der Kamp G,et al. Measuring precipitation with a geolysimeter[J]. Hydrology and Earth System Sciences,2017-01-01,21(10)