10.6084/m9.figshare.1569187.v1
Markus Weiler
Markus
Weiler
Nicole Jackisch
Nicole
Jackisch
The hydrologic outcome of a Low Impact Development (LID) site including superposition with streamflow peaks
Taylor & Francis Group
2015
swm
discharge
analysis
retention capacity
30 months
superposition
volume
Stormwater Management
hydrologic outcome
future LID site designs
antecedent conditions
Weak performance
unfavourable conditions
streamflow peaks Hydrology
Low Impact Development
storm characteristics
performance metrics
monitoring precipitation
hydrologic performance
2015-10-01 00:00:00
Journal contribution
https://tandf.figshare.com/articles/journal_contribution/The_hydrologic_outcome_of_a_Low_Impact_Development_LID_site_including_superposition_with_streamflow_peaks/1569187
<div><p></p><p>Hydrology plays a key role in mitigating environmental impacts with Stormwater Management (SWM). Site-level Low Impact Development (LID) is a promising approach but impeded by a lack of experience, performance metrics and comprehensive analysis. This study investigated the hydrologic performance of a small LID site (0.15 km<sup>2</sup>) including superposition with high flows of the receiving stream by monitoring precipitation, discharge and streamflow for 30 months. The results (73% event capture, 66–87% volume reduction, 39 L/ha/s peak discharge, 4.5% streamflow amplification) implied that site-level LID provides an alternative to conventional SWM even for unfavourable conditions. Weak performance related to underground storage, antecedent conditions, storm characteristics and freezing periods occurred seasonally; and a minimum storm capture volume could not be observed, but a maximum retention capacity. Future LID site designs should consider these characteristics and limitations, together with a differentiated analysis of a set of metrics for deducing environmental implications.</p></div>