Rain catch under wind and vegetal cover effects

被引：8

作者：

Guo, JCY ^{[1
]}

Urbonas, B ^{[1
]}

Stewart, K ^{[1
]}

机构：

[1] Univ Colorado, Dept Civil Engn, Denver, CO 80217 USA

来源：

JOURNAL OF HYDROLOGIC ENGINEERING | 2001年 / 6卷 / 01期

关键词：

Computer simulation - Rain - Vegetation - Watersheds - Weather information services - Wind;

D O I：

10.1061/(ASCE)1084-0699(2001)6:1(29)

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Wind effects on a rain gauge can cause a significant underestimation of rainfall depths and contribute to the inconsistency in rainfall data. To reconstruct rainfall data requires a consistent method to quantify the undercatch. Although some empirical adjustment factors have been recommended, they are not generalized enough to reflect the variations of wind speed with respect to height. This paper presents a model by which the undercatch at an elevated rain gauge can be estimated by the logarithmic wind velocity profile and raindrop terminal velocity. Deficiency percentages of rain catch predicted by this model agree with field observations and recommended adjustment factors. This approach was further expanded to predict rain undercatch percentage due to vegetal coverage or other obstructions.

引用

页码：29 / 33

页数：5

共 17 条

[1]

Brakensiek D.L., 1979, FIELD MANUAL RES AGR

[2]

Chow T.V., 1988, APPL HYDROLOGY

[3]

CURTIS DC, 1995, 1995 SW ASSN ALERT S

[4]

CURTIS DC, 1996, P 1996 CAL NEV ALERT

[5]

GRAY DM, 1973, HDB PRINCIPLES HDYRO

[6]

GUO JCY, 1999, CHANNEL DESIGN FLOW

[7]

HAMON WR, 1973, 362 WMO, V1

[8] COMPARISON OF PRECIPITATION CATCH BETWEEN NINE MEASURING SYSTEMS [J].

Hanson, Clayton L. ;

Johnson, Gregory L. ;

Rango, Albert .

JOURNAL OF HYDROLOGIC ENGINEERING, 1999, 4 (01) :70-75

[9]

KURTYKA JC, 1953, DA36039 STAT WAT SUR

[10]

LARSON L, 1974, WATER RESOUR RES, V10

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