An example of the adverse impacts of various anthropogenic activities on aquatic bodies: Water quality assessment of the Provadiyska river (Northeastern Bulgaria)

Phosphorus in surface waters accelerate algal growth and eutrophication, considerably influencing water quality. Spatiotemporal changes in phosphorus concentration are crucial for environmental issues. We aimed to study the temporal and spatial changes in water quality in a river and in a drainage water system considering different land uses. To this aim, 15 water samples were collected from the origin of the river to the estuary, in the Bostankar River watershed (N-Iran), during spring and winter. Further samples were collected from agricultural drainage water in rice fields, tea, flower, orange as well as kiwi gardens, and forests during spring and winter. EC, pH, TDS, and three forms of phosphorus (total, particulate, and soluble) were measured in the water samples. The results showed that water quality changes in agricultural drainage water were time-dependent; the average total phosphorus was 0.4 mg l-1 lower in the spring than in the winter. The highest phosphorus concentration (1.29 mg l-1) occurred in the winter in the drainage water of the orange gardens. Temporal and spatial changes of the river showed that water quality reduced from the river upstream (jungles and grasslands) towards the downstream (different agricultural land uses), and the amount of phosphorus increased from 0.25 to 0.5 mg l− 1. The TDS increased from 60 to 220 mg l− 1 in the river in the winter. Finally, the results showed that human activities were the main factor in river water quality reduction due to agricultural activities.

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A review of the application of the Macroinvertebrate-based Multimetric Index (MMI) for water quality monitoring in lakes

Ndatimana

Nantege

Arimoro

2022

Preprint

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The increasing stress on lake ecosystems is affecting their functioning such as providing goods and services to inhabiting organisms and riparian communities. Monitoring of water quality is important for sustainable management and restoration of lake ecosystems. However, the costs associated with traditional approaches have become prohibitive while not giving reliable early warning signals on resource conditions. Therefore, the current shift in the use of bioindicators and multimetric indices (MMIs) in the monitoring of water quality is currently gaining global recognition with more emphasis on its application in lotic ecosystems. Therefore, this paper provides an elaborated insight into the application of macroinvertebrate-based MMIs in lentic ecosystems and the successes achieved so far. The various metrics and indices, the development strategies, application challenges, the use of macroinvertebrates as bioindicators, and the future projection of enhancing MMI usage in lentic environment monitoring particularly in developing countries are extensively covered. The use of MMI as a rapid lake biomonitoring tool needs to be adopted for sustainable applications in lake ecosystem management and as an integrated approach to monitoring human-induced stress especially in developing countries where there is a paucity of information.

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An example of the adverse impacts of various anthropogenic activities on aquatic bodies: Water quality assessment of the Provadiyska river (Northeastern Bulgaria)

Cited by 3 publications

References 11 publications

A review of the application of the macroinvertebrate-based multimetric indices (MMIs) for water quality monitoring in lakes

A review of the application of the macroinvertebrate-based multimetric indices (MMIs) for water quality monitoring in lakes

The role of land use on phosphorus release and longitudinal changes of pollution in an agricultural watershed, Bostankar river, Iran

A review of the application of the Macroinvertebrate-based Multimetric Index (MMI) for water quality monitoring in lakes

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