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The effect of anthropogenic activities on the spatial distribution of total nitrogen and total phosphate in Lake Maninjau

Komala Puti S., Zulkarnaini Zulkarnaini, Kurniati Roselyn I., Fauzi Mhd

Journal of Water and Land Development

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2024

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no. 60

71--78

EN

This study aimed to analyse the effect of anthropogenic activities on the spatial distribution of total nitrogen (TN) and total phosphate (TP) in Lake Maninjau, Indonesia, during the dry season. Sampling was carried out at ten observation locations representative for various activities around the lake. Cluster analysis and ANOVA were used to classify pollutant sources and observe differences between TN and TP at each site. Concentrations of TN and TP are categorised as oligotrophic-eutrophic. The ANOVA showed spatially that some sampling locations, such as the Tanjung Sani River, floating net cages, and hydropower areas have different TN concentrations. At the same time, TP levels were consistently significantly different across sampling sites. ANOVA and cluster analysis confirmed that floating net cages were the first cluster and the primary contributor to TN and TP. The second and third clusters come from anthropogenic activities around the lake, such as agriculture, settlement, and livestock. The fourth cluster with the lowest TN and TP is the river that receives the anthropogenic activity load but has a high flow velocity. The cluster change analysis needs to be conducted when there are future changes in the composition of floating net cages, agriculture, and settlements.

2

Assessing Environmental Factors on the Growth and Distribution of Mangrove Seedlings Along the Bintuni Riverbank Area, Bintuni Bay, West Papua, Indonesia

Sraun Markus, Bawole Roni, Marwa Jonni, Sinery Anton Silas, Cabuy Reinardus Liborius

Journal of Ecological Engineering

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2023

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Vol. 24, nr 8

1--11

EN

Bintuni Bay is considered one of the largest mangrove ecosystems in the world, and it has benefited a lot to local inhabitants and the surrounding ecosystem by underpinning and maintaining ecosystem balances. This study assesses various environmental factors that affect the flow of the Bintuni River and mangrove ecosystems as a result of potential degradation due to various anthropogenic activities and small-scale industries along the river. Several environmental parameters were collected, measured, and analyzed in the laboratory, while mangrove seedlings were measured and calculated at five different locations to obtain the importance value index (IVI). The results indicated slightly varied environmental parameters and concentrations at the five locations. However, there was no significant difference in the environmental parameters between the five different locations (p-value of 0.953 > 0.05, 95% of CI). Mangrove seedlings were distributed evenly along the five different locations which were indicated by the number of individuals (ind/ha). There was no significant correlation among these environmental parameters because of the low concentrations of chemical and biological compounds in the water. Moreover, mangroves can regenerate, grow, and exist even in extreme and unbalanced environmental niches.

3

Evaluation of the impact of anthropogenic activities on surface water quality using a water quality index and environmental assessment

García-Ávila Fernando, Jiménez-Ordóñez Magaly, Torres-Sánchez Jessica, Iglesias-Abad Sergio, Cabello Torres Rita, Zhindón-Arévalo César

Journal of Water and Land Development

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2022

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no. 53

58--67

EN

The article presents an assessment of the effects of anthropogenic activities on the quality of water in four streams flowing through a camp based on a combined assessment of environmental impacts and the water quality index. The quantitative and qualitative assessment of environmental impact was made after identifying the anthropogenic activities carried out in the camp. The water quality index (WQI) was calculated after monitoring seventeen physicochemical and microbiological variables and the Montoya index was applied. The samples were collected during 48 sampling campaigns, organised over the period of six months in eight stations. Two stations were located in each stream, one before and one after it passed through the camp. The results indicated that streams 1, 3, and 4 show a slight deterioration in water quality, affected by anthropogenic activities carried out in the said camp; meanwhile, stream 2 shows an increasing deterioration in water quality. The water quality of the streams before passing through the camp was determined to be between “uncontaminated” and “acceptable”, while after passing through the camp it was classified between “acceptable” and “slightly contaminated”. The results indicated a non-significant difference between the downstream and upstream WQI values for streams 1, 3, and 4; while stream 2 did show a significant difference in the WQI between upstream and downstream; indicating that anthropogenic activities alter the quality of the water.

4

The Variability of Surface Chlorophyll-a in Lake Rawa Pening within Five-Month Observations

Amelia Karla, Nuringtyas Satria Bagus, Setiawan Riza Yuliratno, Setyobudi Eko, Adharini Ratih Ida, Aryudiawan Candra, Maslukah Lilik

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 4

173--178

EN

Lake Rawa Pening is a natural lake in the Semarang Regency of Central Java Province, Indonesia, and its existence is pivotal to the surrounding communities as it provides ecological, economic, and social benefits. The ecosystem health of Rawa Pening can be represented by chlorophyll-a concentration because it indicates phytoplankton biomass, nutrient availability, and fish resources. Hence, the present study aims to disentangle the monthly variability of surface chlorophyll-a in Rawa Pening Lake by analyzing water samples that were collected once a month from nine stations within five-month observations (September 2020 to January 2021). The samples were analyzed using spectrophotometric method. Results showed that the highest surface chlorophyll-a concentration (23.33 mg/m3) took place in December, while the lowest concentration (12.64 mg/m3) occurred in October. The monthly variability of surface chlorophyll-a was likely controlled by variation of rainfall, with the highest (18.72 mm) and the lowest (12.33 mm) rainfall happened in December and October, respectively. The present study also indicates the anthropogenic activities such as agricultural activities, floating food stands, aquaculture, and tourist boats may contribute to surface chlorophyll-a variability in Rawa Pening Lake.

5

Groundwater Quality Assessment for Human Drinking in Rural Areas, Al-Hoceima Province (Northern Morocco)

Mchiouer Fatiha, Boughrous Ali Ait, El Ouarghi Hossain

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 3

138--147

EN

The aim of this study is to assess the quality of water for drinking in the rural area of the city of Al-Hoceima, in order to measure the health risks to which people who use it for their needs are exposed. A cross-sectional, descriptive, and analytical study was carried out on 60 households selected randomly. Well and spring water samples (8 wells and 8 springs) were collected in November and December 2019 and analyzed according to the standard methods of water analysis. The survey indicated that water consumed by 80.00% of households does not receive any prior treatment. With the lack of a collective excreta and wastewater management system in the municipality, 99.00% of households have latrines, 50.00% of which are installed within 15meters of the water source. The bacteriological analyses indicate that all the sampled points are contaminated by fecal contamination germs. This poor quality may be due to various anthropogenic activities, and the presence of non-standardized septic tanks. Therefore, protecting and improving water sources must be accompanied by adequate measures of disinfection of these waters before their use.

6

Impact of Anthropic Activities on the Quality of Groundwater in the Central Rif (North Morocco)

Benyoussef Said, Arabi Mourad, El Ouarghi Hossain, Ghalit Mohammad, Azirar Maryam, El Midaoui Adil, Ait Boughrous Ali

Ecological Engineering & Environmental Technology

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2021

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Vol. 22, iss. 6

69--78

EN

The present study aimed to evaluate the effects of human anthropic activities on the physicochemical and biological properties as well as the quantity of the groundwater in the central Rif of Morocco. Series of analyses were carried out on the water resources of this area. The interpretation of analytical data and the distribution of groundwater into groups were treated using multivariate statistical methods including Principal Component Analysis (PCA) and the Ascending Hierarchical Classification (CHA). The results of the present study showed strong mineralization of the investigated area waters. This study also indicated the impact of anthropogenic activities and their influences on the quality of groundwater in the central Rif, with the presence of total coliforms, fecal Escherichia coli type, and fecal streptococci intestinal enterococcal type, suggesting that the contamination of this groundwater was induced by human pollution. In addition, the infiltration of groundwater by wastewater from septic tanks, the use of wastewater for irrigation purposes, the increased use of fertilizers and pesticides in agriculture, and irregular rainfall in the region constitute the main factors of anthropogenic contamination of groundwater in the study area.

7

Anthropogenic impacts on environment and quality of water supply

Kris J., Galik M., Nemes P.

Inżynieria Mineralna

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2013

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R. 14, nr 2

79--84

EN

Water in the nature is not distributed in sufficient quality and quantity in time and space to meet water demands in line with the requirements for safe drinking water. In the past, water was free for all and one could use it without any restrictions for his needs. Drinking water consumption increases due to the impact of demographic trends and the level of water supply as well as technological and industrial development. Meeting the demands is more difficult because of limited possibilities of increasing food production due to pollution and increasing demands for use of natural resources.

XX

Woda w przyrodzie nie jest rozprowadzania w odpowiedniej jakości i ilości w czasie i przestrzeni, aby sprostać wymogom bezpieczeństwa wobec niej. W przeszłości woda była darmowa dla wszystkich i każdy mógł używać jej bez jakichkolwiek ograniczeń. Konsumpcja wody pitnej wzrosła ze względu na wpływ tendencji demograficznych oraz poziomu jej zaopatrzenia jak również ze względu na rozwój przemysłu. Sprostanie wymaganiom jest trudniejsze, ponieważ ograniczone są możliwości zwiększenia produkcji jedzenia przez zanieczyszczenia oraz zwiększenia wymagań wobec użycia źródeł naturalnych.

8

Identification of water quality and benthos characteristics in Daya Bay, China, from 2001 to 2004

Wang Y-S., Sun C-C., Lou Z-P., Wang H., Mitchell B.G., Wu M-L., Sun Z-X.

Oceanological and Hydrobiological Studies

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2011

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Vol. 40, No.1

82-95

EN

Physicochemical and benthos data were collected from 12 marine monitoring stations in Daya Bay, during 2001-2004. 12 stations in Daya Bay could be grouped into three clusters: cluster I consisted of stations in the southern part of Daya Bay (stations S1, S2 and S6); cluster II consisted of stations in the cage culture areas (stations S3, S4, S5 and S8); cluster III consisted of stations in the southwest, the middle and the northeast of the Bay (stations S7, S9, S10, S11 and S12). Calculation with bivariate correlations between benthos and major physicochemical factors showed that the density of benthos in all stations correlated positively with temperature, DO, pH, NH4-N, SiO3-Si, SiO3-Si /PO4-P and chlorophyll a and was negatively correlated with salinity, Secchi, COD, NO3-N, NO2-N, TIN, PO4-P, TIN/PO4-P and BOD5. Factor analysis showed that there were high positive loading salinity, Secchi and NH4-N of three clusters. Results revealed that temperature, DO, pH, SiO3-Si and SiO3-Si/PO4-P and chlorophyll a could also play an important role in determining the biomass of benthos in Daya Bay, especially near the Nuclear Power Plants, in the southern part and in the cage culture areas.