Environmental issues of Lake Taihu, China
Environmental issues of Lake Taihu, China
复制标题
中国太湖的环境问题
DOI：
10.1007/s10750-006-0521-5
复制
发表时间：
2007-05-01
期刊：
影响因子：
2.6
通讯作者：
Zhang, Yunlin
中科院分区：
文献类型：
--
作者：
Qin, Boqiang;Xu, Pengzhu;Zhang, Yunlin
太湖的特点是湖浅（平均深度为1.9米），面积大（2 338平方公里）。径流主要来源于西部和西南部山区，径流分布在整个东太湖。这导致南部的保留时间较短。相反，城市污染物排放到北方太湖，导致水质较差。农村面源污染和生活污水是主要污染源。水流速度范围为10-30 cm s（-1），表面水流通常随风向而动。底流似乎是一种补偿流。大多数波高小于40厘米，水下辐照度与水柱中的悬浮物相关。湖相沉积物分布于沿岸的地带，多沿西部岸线沿着分布，湖心几乎无堆积。东太湖养殖业的过度发展导致水体富营养化，影响了周边地区的供水。此外，东部沿岸的地带和东太湖地区沼泽化发展。东太湖的泄洪功能已受到水生植物的限制。太湖面临的问题将通过改善对入湖营养源的管理来缓解。
Lake Taihu is characterized by its shallowness (mean depth = 1.9 m) and large surface area (2,338 km(2)). Runoff sources are mostly from the mountainous west and southwest, and outflows are located throughout East Taihu. This causes shorter retention times in the south. In contrast, urban pollutants discharge into northern Taihu and result in poor water quality. Non-point pollution from rural areas and sewage wastewater is the primary pollution source. Water current velocity ranges from 10-30 cm s(-1), and surface currents normally follow wind direction. Bottom currents appear to be a compensation flow. Most wave heights are less than 40 cm, and underwater irradiance correlates to seston in the water column. Lacustrine sediment is distributed in littoral zones, mostly along the western shoreline, with almost no accumulation in the lake center. Intensive aquaculture in East Taihu caused eutrophication and hampered water supply in surrounding areas. In addition, development of marshiness in the eastern littoral zones and East Taihu has occurred. The function of flood discharging of East Taihu has been limited by flourishing macrophytes. The problems facing in Lake Taihu will be alleviated by improving the management of nutrient sources into the lake.