淡水变水层疏目拖网经验设计方法的研究

本文根据作者十余年试验研究的经验和资料，分析了总结了我国内陆水域当前使用的几十种变水层疏目拖网，在选优淘劣的基础上，用数理统计的方法，计算出淡水变水层疏目拖网的主机功率与网口周长的关系式，以及拖网其它各部分主尺度与网口周长的比例等系列关系式，为小马力淡水变水层疏目拖网设计总结出一种简便、易行、可靠的经验设计方法。

EMPIRICAL DESIGN OF FRESH WATER PELAGIC TRAWL WITH ENLARGED MESHES

Based on the many years' experience of the authors and data obtainedfrom the study of Fresh water pelagic trawl with enlarged meshes, the paper analysed tenand more such trawls currently used in inland waters of this country; According tomathematical statistics, the relationship between the required power output of the mainengine and the parameters of the trawl mouth was derined. In addition, the proportionsof the rest of the trawl sizes to the parameters ofits mouth were also formulated. The pa- per provides a simple, practical and reliable method for empirical design of freshwaterpelagic trawl with enlarged meshes