The water quality status of estuarine micro-system types along the coast of KwaZulu-Natal Province, South Africa

IF 1 4区 环境科学与生态学 Q4 WATER RESOURCES
G. Bate, D. Lemley, M. Nunes, J. Adams
{"title":"The water quality status of estuarine micro-system types along the coast of KwaZulu-Natal Province, South Africa","authors":"G. Bate, D. Lemley, M. Nunes, J. Adams","doi":"10.17159/wsa/2023.v49.i3.4038","DOIUrl":null,"url":null,"abstract":"A survey of the quality of water flowing from micro-system types to the ocean, along the subtropical east coast of South Africa, showed a wide variation in the concentrations of total nitrogen, phosphorus and phytoplankton biomass in the different systems located, in many cases, only a short distance from each other along the coastline. The origins of the high phytoplankton growth indicate pollutants caused by the land-use in this highly populated coastal region. The main agricultural activities in the area are sugarcane, permanent orchards, and forestry. The levels of N and P in the water varied from ‘good’ to ‘poor’, i.e., TN 0.15–3.99 mg‧L−1, TP 0.02–0.33 mg‧L−1 and chlorophyll-a from 0 to almost 45 µg‧L−1. Rapid coastal population densification appears to have been the cause of the pollution levels measured for total nitrogen, phosphorus, and phytoplankton biomass. Most of the micro-systems with a total modified peri-catchment above 80% were enriched by both TN and TP. While the hypothesis tested was that the main cause was residential development (e.g., septic tank effluent), it was not possible to show any statistical significance to support such a specific conclusion. Although these systems are small individually, the great number along the coastline warrants recognition as important sources of freshwater inflow and nutrients to the marine environment.","PeriodicalId":23623,"journal":{"name":"Water SA","volume":"11 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water SA","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.17159/wsa/2023.v49.i3.4038","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"WATER RESOURCES","Score":null,"Total":0}
引用次数: 0

Abstract

A survey of the quality of water flowing from micro-system types to the ocean, along the subtropical east coast of South Africa, showed a wide variation in the concentrations of total nitrogen, phosphorus and phytoplankton biomass in the different systems located, in many cases, only a short distance from each other along the coastline. The origins of the high phytoplankton growth indicate pollutants caused by the land-use in this highly populated coastal region. The main agricultural activities in the area are sugarcane, permanent orchards, and forestry. The levels of N and P in the water varied from ‘good’ to ‘poor’, i.e., TN 0.15–3.99 mg‧L−1, TP 0.02–0.33 mg‧L−1 and chlorophyll-a from 0 to almost 45 µg‧L−1. Rapid coastal population densification appears to have been the cause of the pollution levels measured for total nitrogen, phosphorus, and phytoplankton biomass. Most of the micro-systems with a total modified peri-catchment above 80% were enriched by both TN and TP. While the hypothesis tested was that the main cause was residential development (e.g., septic tank effluent), it was not possible to show any statistical significance to support such a specific conclusion. Although these systems are small individually, the great number along the coastline warrants recognition as important sources of freshwater inflow and nutrients to the marine environment.
南非夸祖鲁-纳塔尔省沿海河口微系统类型水质状况
对沿南非亚热带东海岸从微系统类型流向海洋的水质进行的一项调查显示,在许多情况下,沿海岸线彼此相距不远的不同系统中,总氮、磷和浮游植物生物量的浓度差别很大。浮游植物高生长的起源表明,在这个人口密集的沿海地区,土地利用造成了污染物。该地区的主要农业活动是甘蔗、永久果园和林业。水体的氮、磷含量由“好”到“差”,即TN为0.15 ~ 3.99 mg·L−1,TP为0.02 ~ 0.33 mg·L−1,叶绿素-a为0 ~近45 μ g·L−1。快速的沿海人口密度似乎是测量总氮、磷和浮游植物生物量的污染水平的原因。总改良围集水区80%以上的微系统主要富集全氮和总磷。虽然测试的假设是主要原因是住宅发展(例如化粪池污水),但不可能显示任何统计意义来支持这种具体结论。虽然这些系统个别都很小,但沿海岸线的大量系统值得承认是淡水流入和海洋环境营养物的重要来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Water SA
Water SA 环境科学-水资源
CiteScore
2.80
自引率
6.70%
发文量
46
审稿时长
18-36 weeks
期刊介绍: WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信