The impact of water quality on species diversity and richness of macroinvertebrates in small water bodies in Lake Victoria Basin, Kenya

Small water bodies ranging in size from 1 to 50,000 m2, are numerous, widely distributed, and have various functions in water storage, agriculture, and fisheries. Small water bodies used for agriculture and fisheries are economically significant in China, hence it is important to properly identify and analyze them. In remote sensing technology, water body identification based on band analysis, image classification, and water indices are often designed for large, homogenous water bodies. Traditional water indices are often less accurate for small water bodies, which often contain submerged or floating plants or easily confused with hill shade. Water quality inversion commonly depends on establishing the relationship between the concentration of water constituents and the observed spectral reflectance. However, individual variation in water quality in small water bodies is enormous and often far beyond the range of existing water quality inversion models. In this study, we propose a method for small water body identification and water quality estimation and test its applicability in Wuhan. The kappa coefficient of small water body identification is over 0.95, and the coefficient of determination of the water quality inversion model is over 0.9. Our results show that the method proposed in this study can be employed to accurately monitor the dynamics of small water bodies. Due to the outbreak of the COVID-19 pandemic, the intensity of human activities decreased. As a response, significant changes in the water quality of small water bodies were observed. The results also suggest that the water quality of small water bodies under different production modes (intensive/casual) respond differently in spatial and temporal dimensions to the decrease in human activities. These results illustrate that effective remote sensing monitoring of small water bodies can provide valuable information on water quality.

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Contribution of fish farmers to conservation of endangered Lake Victoria Basin fish species - the case of Oreochromis variabilis and O. esculentus.

10.1079/ac.109984.20203482976 ◽

2020 ◽

Author(s):

Harrison Charo-Karisa ◽

Jacob Maithya

Keyword(s):

Growth Performance ◽

Fish Species ◽

Lake Victoria ◽

Culture Conditions ◽

Water Bodies ◽

Lake Victoria Basin ◽

Endangered Fish ◽

Small Water ◽

Course Of Action

Abstract This paper discussed the conservation efforts of fish farmers of two endangered fish species in Lake Victoria namely Oreochromis variabilis and O. esculentus. Highlights focused on the determination of their growth performance under culture conditions, assessing their suitability for aquaculture, recruiting farmers to culture the species and testing the suitability of new dams and ponds for aquaculture. Both species breed easily under culture conditions. Therefore production of the fingerlings and their subsequent stocking in ponds, small water bodies and other larger water masses, including Lake Victoria, was a course of action implemented by the fish farmers to bring about their restoration.

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The Impact of Water Chemistry on Zooplankton Occurrence in Two Types (Field versus Forest) of Small Water Bodies

International Review of Hydrobiology ◽

10.1002/iroh.200911166 ◽

2010 ◽

Vol 95 (2) ◽

pp. 130-141 ◽

Cited By ~ 16

Author(s):

Natalia Kuczyńska-Kippen ◽

Tomasz Joniak

Keyword(s):

Water Chemistry ◽

Water Bodies ◽

Small Water ◽

Field Versus ◽

The Impact ◽

Small Water Bodies

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Spatial Distribution, Changes, Uses and Water Quality of Small Water Bodies in Ghiduari Mouza

Jahangirnagar University Environmental Bulletin ◽

10.3329/jueb.v1i0.14542 ◽

2013 ◽

Vol 1 ◽

pp. 1-14

Author(s):

Md Al-Amin Hoque ◽

Ummeh Saika ◽

Khondaker Mohammod Shariful Huda

Keyword(s):

Water Quality ◽

Spatial Distribution ◽

Water Bodies ◽

Small Water ◽

Small Water Bodies

DOI: http://dx.doi.org/10.3329/jueb.v1i0.14542Jahangirnagar University Environmental Bulletin, Vol.1, 1-14, 2012

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Monitoring the Water Quality of Small Water Bodies Using High-Resolution Remote Sensing Data

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi8120553 ◽

2019 ◽

Vol 8 (12) ◽

pp. 553 ◽

Cited By ~ 2

Author(s):

Zehra Yigit Avdan ◽

Gordana Kaplan ◽

Serdar Goncu ◽

Ugur Avdan

Keyword(s):

Remote Sensing ◽

Water Quality ◽

High Resolution ◽

Quality Parameters ◽

Water Bodies ◽

Water Quality Parameters ◽

Water Turbidity ◽

Small Water ◽

Red Edge ◽

Small Water Bodies

Remotely sensed data can reinforce the abilities of water resources researchers and decision-makers to monitor water quality more effectively. In the past few decades, remote sensing techniques have been widely used to measure qualitative water quality parameters. However, the use of moderate resolution sensors may not meet the requirements for monitoring small water bodies. Water quality in a small dam was assessed using high-resolution satellite data from RapidEye and in situ measurements collected a few days apart. The satellite carries a five-band multispectral optical imager with a ground sampling distance of 5 m at its nadir and a swath width of 80 km. Several different algorithms were evaluated using Pearson correlation coefficients for electrical conductivity (EC), total dissolved soils (TDS), water transparency, water turbidity, depth, suspended particular matter (SPM), and chlorophyll-a. The results indicate strong correlation between the investigated parameters and RapidEye reflectance, especially in the red and red-edge portion with highest correlation between red-edge band and water turbidity (r2 = 0.92). Two of the investigated indices showed good correlation in almost all of the water quality parameters with correlation higher than 0.80. The findings of this study emphasize the use of both high-resolution remote sensing imagery and red-edge portion of the electromagnetic spectrum for monitoring several water quality parameters in small water areas.

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Influence of land development on the ecological status of small water bodies

Oceanological and Hydrobiological Studies ◽

10.1515/ohs-2020-0030 ◽

2020 ◽

Vol 49 (4) ◽

pp. 345-353

Author(s):

Anna Dudzińska ◽

Barbara Szpakowska ◽

Maria Pajchrowska

Keyword(s):

Arable Land ◽

Ecological Status ◽

Land Development ◽

Water Bodies ◽

Urban Landscapes ◽

Species Trees ◽

Small Water ◽

Q Index ◽

The Impact ◽

Small Water Bodies

AbstractSmall water bodies play a specific role in the landscape, as they increase the mosaic pattern of a given area, retain water and affect hydrological regime in adjacent soils. These water bodies are the most important in landscapes that have been largely transformed by man, such as agricultural and urban landscapes. The author of this study assessed the ecological status of small water bodies using the Q index and determined the impact of the development of adjacent areas on their ecological status. The analysis of the Q index referring to water bodies showed that its values changed considerably not only during the whole study period but also during one year (from 1.74 to 4.28). The land use analysis in the designated buffer zones stretching within 500 m and 1000 m from the water bodies showed that arable land occupied the largest area. This fact determines the ecological status of these water bodies. Ecotones that develop around ponds can function as biogeochemical barriers reducing pollution in the area. A total of 116 species of vascular plants were identified in the water bodies under study. Herbaceous plants constituted the largest group – 87 species. Trees and shrubs were represented by 16 species and macrophytes by 16 taxa.

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