Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda

Lake Bunyonyi is one of the major resources of social-economic potential in the districts of Rubanda and Kabale, South- Western Uganda. The lake’s sub-catchment faces environmental problems because of intensive agriculture, settlement, business and tourism activities, which consequently cause poll...

Full description

Saved in:
Bibliographic Details
Main Authors: Alex, Saturday, Thomas, J. Lyimo, John, Machiwa, Siajali, Pamba
Format: Article
Language:en_US
Published: Springer 2022
Subjects:
Online Access:http://hdl.handle.net/20.500.12493/749
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1800403074628452352
author Alex, Saturday
Thomas, J. Lyimo
John, Machiwa
Siajali, Pamba
author_facet Alex, Saturday
Thomas, J. Lyimo
John, Machiwa
Siajali, Pamba
author_sort Alex, Saturday
collection KAB-DR
description Lake Bunyonyi is one of the major resources of social-economic potential in the districts of Rubanda and Kabale, South- Western Uganda. The lake’s sub-catchment faces environmental problems because of intensive agriculture, settlement, business and tourism activities, which consequently cause pollution of water in the lake’s system. This study, therefore, intended to determine the processes that govern nitrogen dynamism using a numerical model that takes into account various processes in the system using STELLA® 8.1.1 software. From the model simulation, it was found that mineralization, microbial uptake and nitrification were the major processes governing nitrogen transformation in the water phase, accounting for 47.8% (0.49 g/d m−2), 44.2% (0.45 g/d m−2), and 7.8% (0.05 g/d m−2), respectively. The developed model predicted reasonably well the behaviour of the lake evidenced by the validation results of observed and simulated data that showed good linear regression coefficients (R2) of organic nitrogen (0.48), ammonia–nitrogen (0.68), and nitrate–nitrogen (0.61). The model has proven suitable for application on lakes with characteristics similar to that of Lake Bunyonyi. The study recommended that a compressive investigation that puts into consideration all the possible sources of nutrient and water inflow into the lake system be done on Lake Bunyonyi.
format Article
id oai:idr.kab.ac.ug:20.500.12493-749
institution KAB-DR
language en_US
publishDate 2022
publisher Springer
record_format dspace
spelling oai:idr.kab.ac.ug:20.500.12493-7492024-01-17T04:46:05Z Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda Alex, Saturday Thomas, J. Lyimo John, Machiwa Siajali, Pamba Denitrification · Lake Bunyonyi · Mineralization · Nitrification and nitrogen dynamics Lake Bunyonyi is one of the major resources of social-economic potential in the districts of Rubanda and Kabale, South- Western Uganda. The lake’s sub-catchment faces environmental problems because of intensive agriculture, settlement, business and tourism activities, which consequently cause pollution of water in the lake’s system. This study, therefore, intended to determine the processes that govern nitrogen dynamism using a numerical model that takes into account various processes in the system using STELLA® 8.1.1 software. From the model simulation, it was found that mineralization, microbial uptake and nitrification were the major processes governing nitrogen transformation in the water phase, accounting for 47.8% (0.49 g/d m−2), 44.2% (0.45 g/d m−2), and 7.8% (0.05 g/d m−2), respectively. The developed model predicted reasonably well the behaviour of the lake evidenced by the validation results of observed and simulated data that showed good linear regression coefficients (R2) of organic nitrogen (0.48), ammonia–nitrogen (0.68), and nitrate–nitrogen (0.61). The model has proven suitable for application on lakes with characteristics similar to that of Lake Bunyonyi. The study recommended that a compressive investigation that puts into consideration all the possible sources of nutrient and water inflow into the lake system be done on Lake Bunyonyi. Kabale University 2022-11-24T13:27:06Z 2022-11-24T13:27:06Z 2022 Article https://doi.org/10.1007/s13201-022-01709-0 http://hdl.handle.net/20.500.12493/749 en_US Attribution-NonCommercial-NoDerivs 3.0 United States http://creativecommons.org/licenses/by-nc-nd/3.0/us/ application/pdf Springer
spellingShingle Denitrification · Lake Bunyonyi · Mineralization · Nitrification and nitrogen dynamics
Alex, Saturday
Thomas, J. Lyimo
John, Machiwa
Siajali, Pamba
Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda
title Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda
title_full Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda
title_fullStr Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda
title_full_unstemmed Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda
title_short Modelling nitrogen transformation in the Lake Bunyonyi ecosystem, South‑Western Uganda
title_sort modelling nitrogen transformation in the lake bunyonyi ecosystem south western uganda
topic Denitrification · Lake Bunyonyi · Mineralization · Nitrification and nitrogen dynamics
url http://hdl.handle.net/20.500.12493/749
work_keys_str_mv AT alexsaturday modellingnitrogentransformationinthelakebunyonyiecosystemsouthwesternuganda
AT thomasjlyimo modellingnitrogentransformationinthelakebunyonyiecosystemsouthwesternuganda
AT johnmachiwa modellingnitrogentransformationinthelakebunyonyiecosystemsouthwesternuganda
AT siajalipamba modellingnitrogentransformationinthelakebunyonyiecosystemsouthwesternuganda