天津河口鱼类洄游产卵期最小需水量研究

Minimum water requirement for migrationfish spawning in Tianjin Estuary

根据天津市历史海区盐度、渔业产量与径流的关系,以及海区盐度与鱼类洄游、产卵、幼鱼孵化、幼体生长的相关分析,建立非线性关系方程,计算了天津市最低入海水量需求;从保护近海生物多样性和促进海区生态恢复的角度,讨论了淡水入海的最佳月份,及其最低入海水量要求,以人工神经网络方法加以辅助验证。结果表明,天津市需要保证最低年入海水量为13.21亿m3,其中4至6月鱼类洄游产卵期需保证最低3.22亿m3的入海淡水量。

To reasonably control the estuary ecosystem structure, protect the water quality and realize the sustainable utilization of sea resources, the minimum amount of sea outflow from Tianjin City to the Bohai Bay was investigated. The fresh water demand in the period from April to June for the purpose of protecting coastal biodiversity and restoring the sea area ecosystem was calculated. The Artificial Neural Network methed was used to verify the conclusion. The results show that a minimum annual amount of sea outflow of 1.32 billion m3 should be guaranteed and 0.32 billion m3 of fresh water must be flow out in the period from April to June.