论文部分内容阅读
丘陵、山区水库,地理环境一般较为复杂。大部分水库具有水面形状不规则,水底凹凸不平,岸边及近岸浅水地带竹、木、芦苇等植物生长繁茂,水下树桩、竹根、残墙、乱石多的特点。水库捕捞作业中网具被水中、水底杂物缠挂的事故时有发生。特别是使用最广泛的刺缠网类,因其纲索细,网衣柔软,极易与其它物体缠绕,“挂网”事故在作业中更是频繁发生。由于网具材料(合成纤维)具有相当大的延伸能力,牵引时力传递效果差,水库捕捞作业的小木船吨位小,无机械动力,船上操作诸多不便,捕捞作业多在寒冷的冬季进行,下水排障颇为艰难,“挂网”事故一旦发生,其排除是较为麻烦
Hilly, mountain reservoirs, the geographical environment is generally more complicated. Most of the reservoirs have the characteristics of irregular water surface, uneven bottom, and lush vegetation such as bamboo, wood and reed in the shore and coastal shallow waters, underwater stumps, bamboo roots, residual walls, and stony rocks. Reservoir fishing operations in the net with water, underwater debris hanging accidents have occurred. In particular, the most widely used thorn net class, because of its thin outline, net clothing soft, easily wrapped with other objects, “hanging” accident is more frequent in the operation. Due to the considerable extension capacity of the mesh material (synthetic fiber), the poor transmission of force when towing, the small tonnage of small wooden vessels for fishing in reservoirs, no mechanical power and inconvenience of operation on ships, the fishing operations are mostly carried out in the cold winter and the water Troubleshoot quite difficult, “netting” accident, the exclusion is more troublesome