کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6409240 | 1629911 | 2016 | 10 صفحه PDF | دانلود رایگان |
- Distinct inter and intra-annual patterns of TTDs were identified.
- El-Niño related drier year and dry seasons exhibited longer MTTs (>100Â days).
- Wetter than average year and wet seasons resulted in shorter MTTs (<50Â days).
- Moisture origin of seasonal rainfall is the most dominant driver of time-variable TTD.
Streams in humid tropical countries provide a wide range of ecosystem services, yet a good understanding of their hydrological functioning is severely limited by lack of data. The transit time of water is a fundamental characteristic of catchment functioning and can often be related to water quality dynamics, thus providing potentially important information for water managers in these environments. In this study, we applied the widely used lumped convolution integral model in a moving window approach to acknowledge the time-variance of transit time distributions (TTD) and resulting moments such as the mean transit time (MTT). We show that for a two-year (2012-2014) rainfall-runoff stable isotope record from almost daily sampling in a humid tropical 30Â km2 catchment in southern Costa Rica, the MTTs are generally short (
Journal: Journal of Hydrology - Volume 542, November 2016, Pages 231-240