Effects of riparian vegetation on evapotranspiration processes and water quality of small plain streams
| Autor: | Gheorghe Şerban, Virgil Iordache, Daniel Dunea, Aurora Neagoe, Ștefania Iordache, Petre Bretcan, Larisa Purcoi, Danut Tanislav |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Hydrology geography geography.geographical_feature_category Land use 010604 marine biology & hydrobiology Vegetation STREAMS Aquatic Science 01 natural sciences Normalized Difference Vegetation Index Ecosystem services Evapotranspiration Environmental science Water quality Riparian zone |
| Zdroj: | Ecohydrology & Hydrobiology. 21:629-640 |
| ISSN: | 1642-3593 |
| DOI: | 10.1016/j.ecohyd.2021.02.004 |
| Popis: | Riparian vegetation provides a wide range of ecosystem services including water quality regulation, flooding avoidance, and the natural control of stream temperatures. Changes in land use and the increase of anthropogenic activities in the proximity of rivers affect the growth and development of riparian buffers. The aim of the work was to assess the effects of riparian vegetation on the evapotranspiration processes and the water quality of small plain streams using remote sensing resources and in-situ monitoring. The area of study considered two neighboring basins of small plain streams (Glavacioc and Ilfov) from Romania. The data obtained from in-situ monitoring performed in 2019 was used in the Penman-Monteith algorithm to calculate the potential evapotranspiration (PET) based on a series of specific parameters. The Green Normalized Difference Vegetation Index (GNDVI), computed from LANDSAT 8 images, has been used to assess the vegetation status at the basin scale. The GNDVI fluctuations were linked to the variations in precipitation regimes and land use modifications. Remote sensing data have shown changes in GNDVI between June and September 2019 in both riparian areas resulting in an intense spread of cattail (Typha spp.). Surface waters arriving at the entrance control sections had a basic pH and were loaded with nitrates and ammonium ion (NH4+), which had decreased at the downstream section after passing the cattail phytosociological associations and the riparian patches, thus acting as buffer areas. The current anthropogenic pressures on the riparian areas might have degenerative effects on the integrity of the vegetation structure. Thus, for effective and sustainable management, it is essential to identify the main stressors and to assess to what extent they affect the riparian ecosystem as a whole. |
| Databáze: | OpenAIRE |
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