Schob, S. (2014): <b>Concentration-Discharge Hysteresis Effects of BOD, COD, Nitrate and Turbidity during Storm Flow Events in the Paramo of Southern Ecuador</b> University of Giessen - Institute of Landscape Ecology and Resources Management, <i>bachelor thesis</i>
Resource Description
Title:
Concentration-Discharge Hysteresis Effects of BOD, COD, Nitrate and Turbidity during Storm Flow Events in the Paramo of Southern Ecuador
FOR816dw ID:
1515
Publication Date:
2014-08-20
License and Usage Rights:
PAK 823-825 data user agreement. (www.tropicalmountainforest.org/dataagreementp3.do)
Future climate and land use change may have a great impact on essential ecosystem functions such as carbon storage and water supply of the Andean p´aramo ecosystem. As hydrogeochemical processes in the p´aramo and possible reactions to these changes are still largely unknown, nutrient fluxes during storm flow events in a<br/>
p´aramo catchment in the Cajas National Park of south Ecuador were studied. From February to June 2014, discharge and stream concentrations of biochemical oxygen demand (BOD), chemical oxygen demand (COD), turbidity and nitrate (NO3-N) were monitored in five minute intervals in the Quinuas River. In order to study the catchment’s response to rainfall events, rotational patterns of concentration-discharge hysteresis effects were analysed. In total, 35 events were suitable for analysing hysteresis effects of BOD, COD, and turbidity. Nitrate concentrations were studied in 20 events. Precipitation events led to an increase of concentration of all parameters. Hysteresis patterns showed a high consistency. COD, turbidity, and nitrate rotated mainly clockwise, BOD counterclockwise. Therefore, a fast response of the sources of COD, nitrate, and turbidity is suggested. This might be mainly due to a fast subsurface flow through the upper organic soil horizons. BOD sources, mainly soil surface and litter layer, predominate later in the<br/>
storm flow event
Keywords:
| hydrochemistry | hydrological processes | nutrient cycle | indirect land use change (ILUC) |
Literature type specific fields:
THESIS
Degree:
bachelor
Degree Institution:
University of Giessen - Institute of Landscape Ecology and Resources Management
