摘要
为掌握红海滩湿地水域的水动力特征和盐度变化规律,利用Mike 21水动力模型对其进行数值模拟。模拟过程中,在考虑径流与潮汐相互作用的条件下加入植被影响因素,模型中植被对水流的影响采用底摩擦项曼宁系数的变化表示;此外,基于Landsat TM卫星遥感技术,通过获取辽河口湿地的翅碱蓬、芦苇植被的空间分布情况,制作曼宁文件加入到模型中进行计算。结果表明:植被的存在能减小湿地水流流速;由于大量植被的存在,湿地中水体的运动特征与河流及海湾水体运动特征具有明显差异;上游径流量的增加导致湿地的盐度总体上呈减小趋势,即上游河流径流量的变化能引起翅碱蓬植被区盐度的变化,并进一步影响翅碱蓬植被生长。本研究成果可为红海滩湿地的保护和修复工作提供科学的参考依据。
The hydrodynamic characteristics and salinity variation in wetland waters in Pink Beach was investigated by the MIke 21 hydrodynamic model in which effect of vegetation on currents was represented by Manning s coefficient,by acquiring spatial distribution of sea grasses Suaeda heteroptera and Phragmites communis in Liao River estuarine wetland based on Landsat TM satellite remote sensing technology,and making Manning files for calculation.The results showed that the vegetation led to reduce the flow rate of wetland water and to differences in characteristics of the water movement between wetland and rivers and gulfs,especially heavy vegetation.The increase in upstream runoff resulted in a decrease in salinity in the wetland,and the variety of upstream runoff caused changes in salinity affecting the growth of the sea grasses.The findings provide scientific reference with the protection and restoration of Pink Beach wetlands.
作者
李晋
乔会婷
徐天平
张洪兴
张明亮
姜恒志
LI Jin;QIAO Hui-ting;XU Tian-ping;ZHANG Hong-xing;ZHANG Ming-liang;JIANG Heng-zhi(Yuanyanggou National Ocean Park,Panjin 124010,China;College of Marine Science and Environment,Dalian Ocean University,Dalian 116023,China;National Marine Environmental Monitoring Center,Dalian 116023,China)
出处
《大连海洋大学学报》
CAS
CSCD
北大核心
2018年第5期625-632,共8页
Journal of Dalian Ocean University
基金
国家自然科学基金资助项目(51579030
51879028)
辽宁省海洋与渔业厅科研项目(201725)
盘锦红海滩湿地退化与生态修复项目(PHL-XZ-2017013-002)
水力学与山区河流国家重点实验室项目(SKHL1517)
关键词
辽河口
红海滩湿地
数值模拟
水动力
Liao River estuary
Pink Beach wetland
numerical simulation
hydrodynamics
作者简介
李晋(1967—),男,高级工程师。E-mail:ln451@163.com;通信作者:张明亮(1976—),男,博士,教授。E-mail:zhmliang_mail@126.com。
