Spatial and temporal occurrence of preferential flow in a forested headwater catchment
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| Title: | Main Title: Spatial and temporal occurrence of preferential flow in a forested headwater catchment |
| Description: | Abstract: The highly dynamic nature of preferential flow in time and space makes it challenging to identify and analyze its occurrence at the catchment scale. Novel analysis methods using soil moisture sensor response times offer an opportunity to investigate catchment-wide controls on preferential flow. The aim of this study was to identify factors that control preferential flow occurrence based on 3-year soil moisture monitoring using a wireless sensor network in the Wüstebach catchment, Germany. At 101 locations, the sensor response times at three depths (5, 20, and 50 cm) were classified into one of four classes: (1) non-sequential preferential flow, (2) velocity-based preferential flow, (3) sequential flow, and (4) no response. A conceptual model, postulating that preferential flow in the Wüstebach catchment is dominated by differences in soil type, landscape position, and rainfall input, was proposed for hypothesis testing. To test the conceptual model, the classification results were combined with spatial and event-based data to understand and identify controlling factors. Spatial parameters consisted of hydrological, topographical, and soil physical and chemical parameters. Temporal factors included precipitation characteristics and antecedent soil moisture conditions. The conceptual model as proposed could only be partly confirmed. Event-based occurrence of preferential flow was highly affected by precipitation amount, with a nearly catchment-wide preferential response during large storm events. During intermediate events, preferential flow was controlled by small-scale heterogeneity, instead of showing catchment-wide patterns. The effect of antecedent catchment wetness on the occurrence of preferential flow was generally less profound, although a clear negative relationship was found for precipitation events with more than 25 mm. It was found that spatial occurrence of preferential flow was however governed by small-scale soil and biological features and local processes, and showed no obvious relationship with any of the selected spatial parameters. Overall, the results demonstrate that sensor response time analysis can offer innovative insights into the spatial–temporal interrelationship of preferential flow occurrence. |
| Identifier: | 10.1016/j.jhydrol.2015.12.050 (DOI) |
Responsible Party
| Creators: | Inge Wiekenkamp (Author), Johan A. Huisman (Author), Heye Bogena (Author), Henry Lin (Author), Harry Vereecken (Author) |
| Publisher: | Elsevier |
| Publication Year: | 2017 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | C1 |
| Subject: | Keyword: Hydrological Modelling |
File Details
| Filename: | Wiekenkamp2016.pdf |
| Data Type: | Text - Article |
| File Size: | 2.8 MB |
| Date: | Available: 02.01.2016 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Free |
| General Access and Use Conditions: | According to the TR32DB data policy agreement. |
| Access Limitations: | According to the TR32DB data policy agreement. |
| Licence: | [TR32DB] Data policy agreement |
Geographic
Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Journal of Hydrology |
| Issue: | March 2016 |
| Volume: | 534 |
| Number of Pages: | 11 (139 - 149) |
Metadata Details
| Metadata Creator: | Michael Stockinger |
| Metadata Created: | 31.05.2017 |
| Metadata Last Updated: | 31.05.2017 |
| Subproject: | C1 |
| Funding Phase: | 3 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 3 |
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