Hatvani, István Gábor and Kovács, József and Márkus, László and Clement, Adrienne and Hoffmann, Richárd and Korponai, János (2015) Assessing the relationship of background factors governing the water quality of an agricultural watershed with changes in catchment property (W-Hungary). JOURNAL OF HYDROLOGY, 521. pp. 460-469. ISSN 0022-1694
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Abstract
With urbanization and the growth of agriculture, the importance of precisely assessing the contribution of diffuse- and point source loads arriving to surface waters is becoming more and more important. Determining their effects, however, is not as straightforward as it at first seems. The main aim of the study was to determine the driving background factors of a river located in an agricultural watershed, and furthermore, to separate the role of the diffuse- and point source nutrient loads. The method used to achieve the aims was Dynamic Factor Analysis. This is an effective tool for exploring time series which describe such phenomena. It is capable of taking into account the lagged correlation structure, thus enabling the researcher to uncover the background processes operating in time series. Dynamic Factor Analysis was applied to the time series (1978–2006) of 21 response parameters measured in the River Zala and 6 explanatory (agricultural, meteorological, water quality, etc.) parameters measured in its watershed. The results demonstrated that with the aid of Dynamic Factor Analysis the superimposed effects of the socio-economic changes which began in the mid-1980s, and the introduction of advanced wastewater treatment (P removal) in the river catchment in the early 1990s could be separated and their relative importance assessed, as well as that of other determining external factors.
Item Type: | Article |
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Uncontrolled Keywords: | GROUNDWATER; river; PHOSPHORUS; AREA ADJACENT; EASTERN-EUROPE; TIME-SERIES; COMMON TRENDS; SHALLOW LAKE BALATON; EVERGLADES-NATIONAL-PARK; DYNAMIC FACTOR-ANALYSIS; River Zala; Point source nutrient input; Hydrology; Dynamic factor analysis; Brodgar; Agricultural diffuse loads |
Subjects: | Q Science / természettudomány > QE Geology / földtudományok > QE08 Hydrosphere. Hydrology / hidroszféra, hidrológia |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 11 Sep 2018 15:40 |
Last Modified: | 11 Sep 2018 15:40 |
URI: | http://real.mtak.hu/id/eprint/83543 |
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