水葫芦控制性种养安全围栏设计及抗风浪能力

Design of anti-stormy wave enclosures for confined growth of water hyacinth in lakes

水葫芦大水面安全控制性种养是水葫芦治理富营养化湖泊的关键技术之一。为了设计经济有效的水葫芦控制性种养设施,对水葫芦控制性种养抗风浪防飘逸设施进行了波浪水槽模拟试验,测量了水葫芦对围栏的作用力以及其在围栏前的堆积高度,并分析了水葫芦群体对风浪的消减作用。结果表明,水葫芦对围栏的作用力、在围栏前的堆积高度随水葫芦种植带宽的增加均呈现先增大后减小的变化规律,水葫芦主要是在水下形成堆积,形成一定规模后的水葫芦群体具有消波防浪的作用。水葫芦防浪带可以大大减少风浪对水葫芦生长的影响。

Confined cultivation of water hyacinth （ Eichhornia crassipes） is one of the key technologies to reduce eutrophi- cation in lakes. In order to design the wave protection facilities that can successfully confine the growth of water hyacinth, the anti-wave capability of the facilities was tested in a flume experiment. The forces exerted by water hyacinth on the enclosure and pile height of water hyacinth in front of the enclosure were measured, and the reduction of stormy wave action by water hyacinth colony was analyzed accordingly. The results revealed that the forces exerted by water hyacinth on the enclosure as well as the pile height of water hyacinth in front of the enclosure increased first and then decreased with the increase of cultivation width. Water hyacinth piled mostly underwater. Water hyacinth could reduce storm wave after growing to a larger scale. The results in- dicated that water hyacinth colony could greatly reduce the effect of stormy wave on the growth of water hyacinth.