The Transmission Effectiveness of the Dissolved Nutrients (N, P, Si) Through a South Mediterranean Estuary (Seybouse, Algeria) Under Large Anthropogenic Forcing

IF 0.4 Q4 ENVIRONMENTAL SCIENCES

Asian Journal of Water, Environment and Pollution Pub Date : 2023-10-09 DOI:10.3233/ajw230059

Omar Ramzi Ziouch, Tarek Daifallah, Houda Chenaker, Zoubir Moujari, Naouel Dali, Rabeh Zebsa

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引用次数: 0

Abstract

The Seybouse Estuary (SE) is the downstream of the second great river in Algeria draining one of the main country’s watersheds (6471 km2, 1.5 million inhabitants). This study highlights the effect of the estuarine part on the distribution and the flux of dissolved nitrogen (N), phosphorus (P) and silicon (Si) through the SE. Surface water sampling was taken and analysed in the dry (September 2016) and wet (April 2017) seasons. Physical parameters and water discharge data were jointly recorded in parallel to sampling dates. Very low flows varying between 0.3 and 4.7 m3 s-1 were recorded at the outlet in dry and wet seasons, respectively. The SE outlet waters were 2.6 and 10 folds higher than upstream in dissolved inorganic nitrogen (DIN) and phosphates (PO4) levels, respectively. However, the silicates (SiO4) levels decreased by about 1/2 in the outlet waters. In terms of flux, the SE delivered to the coast 84 t·yr-1, 9 t·yr-1 and 56 t·yr-1 of DIN, PO4 and SiO4, respectively. The high DIN:PO4 = 137 and low SiO4:DIN = 0.52 molar ratios classify SE as one of the strong anthropised estuaries. The estuarine part amply modifies cycles and budgets of riverine nutrients introduced to the coast.

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在大人为强迫下，溶解营养物(N, P, Si)通过南地中海河口(阿尔及利亚seyouse)的传输有效性

塞舌尔河口(sehouse Estuary, SE)是阿尔及利亚第二大河流的下游，是阿尔及利亚主要的流域之一(6471平方公里，150万居民)。本研究重点研究了河口部分对SE中溶解态氮(N)、磷(P)和硅(Si)的分布和通量的影响。在干季(2016年9月)和湿季(2017年4月)采集地表水样本并进行分析。物理参数和水排放数据与采样日期并行记录。在干季和湿季，出口分别记录到0.3 ~ 4.7 m3 s-1的极低流量。东南方向出水溶解无机氮(DIN)和磷酸盐(PO4)含量分别比上游高2.6倍和10倍。而出水口的硅酸盐(SiO4)含量下降了约1/2。从通量来看，东南向海岸输送的DIN、PO4和SiO4分别为84 t·年-1、9 t·年-1和56 t·年-1。高的DIN:PO4 = 137和低的SiO4:DIN = 0.52的摩尔比使SE成为强烈人类活动的河口之一。河口部分充分地改变了流向海岸的河流养分的循环和平衡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Asian Journal of Water, Environment and Pollution ENVIRONMENTAL SCIENCES-

CiteScore

1.00

自引率

20.00%

发文量

期刊介绍： Asia, as a whole region, faces severe stress on water availability, primarily due to high population density. Many regions of the continent face severe problems of water pollution on local as well as regional scale and these have to be tackled with a pan-Asian approach. However, the available literature on the subject is generally based on research done in Europe and North America. Therefore, there is an urgent and strong need for an Asian journal with its focus on the region and wherein the region specific problems are addressed in an intelligent manner. In Asia, besides water, there are several other issues related to environment, such as; global warming and its impact; intense land/use and shifting pattern of agriculture; issues related to fertilizer applications and pesticide residues in soil and water; and solid and liquid waste management particularly in industrial and urban areas. Asia is also a region with intense mining activities whereby serious environmental problems related to land/use, loss of top soil, water pollution and acid mine drainage are faced by various communities. Essentially, Asians are confronted with environmental problems on many fronts. Many pressing issues in the region interlink various aspects of environmental problems faced by population in this densely habited region in the world. Pollution is one such serious issue for many countries since there are many transnational water bodies that spread the pollutants across the entire region. Water, environment and pollution together constitute a three axial problem that all concerned people in the region would like to focus on.