FIELD OBSERVATIONS OF NEARSHORE CURRENT SYSTEM

Kiyoshi Horikawa, Tamio Sasaki

Abstract


The two systems based on the principle of photogrammetric surveying have been developed in order to accomplish the field observations of nearshore current system induced by waves, and were applied to the field investigations on the Shonan Coast, Kanagawa Prefecture, Japan (Horikawa, Sasaki et al, 1970). The first is called as the Balloon Camera System and the other is the Synchronized Helicopter System. The main efforts were concentrated to the simultaneous observations of waves and current fields in and out the surf zone. Even there still exist some difficulties to be overcome in applying the present systems, the validity and usefulness of these systems were demonstrated by the obtained data. In this paper are presented the details of the developed systems and a part of the analyzed results by using the data obtained in field.

Keywords


field observations; nearshore current; current

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