Leveling rod base required for surveying gravel river bed surface elevations

被引：5

作者：

DeVries, P ^{[1
]}

Goold, DJ ^{[1
]}

机构：

[1] Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA

来源：

WATER RESOURCES RESEARCH | 1999年 / 35卷 / 09期

关键词：

D O I：

10.1029/1999WR900180

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Consistent surveying of bed elevations in natural channels containing gravel and cobble substrates is subject to measurement error if a leveling rod is placed indiscriminately between or on top of individual particles. The influence of surface microtopography decreases with increasing leveling rod base diameter, while the influence of bed form topography increases. Field tests were performed to identify a rod base diameter that minimizes these survey errors. A leveling rod base diameter of 127 mm (5 inches) is suggested to be most appropriate for consistent bed surveys.

引用

页码：2877 / 2879

页数：3