Implications of hydrologic connectivity between hillslopes and riparian zones on streamflow composition

Freyberg, Jana von; Radny, Dirk; Gall, Heather E.; Schirmer, Mario

doi:10.1016/j.jconhyd.2014.07.005

Cited by 55 publications

(64 citation statements)

References 48 publications

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“…On the other hand, water within the layer is able to flow laterally because of its sandy texture and the imbricate structure of the coarse clasts. Besides, with high antecedent soil moisture above field capacity, the local groundwater near the spring is connected with the lateral flow paths from the hillslope, which is comparable to the results of von Freyberg et al (2014), Tetzlaff et al (2014) and Voeckler et al (2014). This linkage causes a fast and considerable discharge increase similar to the ''fill and spill hypothesis'' of Tromp-van Meerfeld and McDonnell (2006).…”

Section: Discussionsupporting

confidence: 70%

Hillslope runoff generation influenced by layered subsurface in a headwater catchment in Ore Mountains, Germany

Heller

Kleber

2016

Environ Earth Sci

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The Ore Mountains were one of the important flood source areas for several heavy floods over the last years. Reducing damages caused by floods demands sufficient information on the runoff generation processes in the catchments. The aim of this study is to provide insights into prevailing flow pathways, retention times and threshold behavior of a representative hillslope catchment with layered subsurface in the Ore Mountains. The study site is a forested headwater with gneiss as bedrock. We used hydrometrical methods, soil temperature data and sprinkler experiments. Results indicate that the hydraulic anisotropic structure of the deepest layer in 0.9-1.7 m depth is the major controlling factor for subsurface water flow paths. On one hand, this layer acts as an aquitard for seeping water because of its high bulk density. On the other hand, water within the layer is able to flow laterally because of the sandy texture and coarse clasts oriented parallel to the slope. Moreover, three pre-moisture controlled types of runoff processes were addressed. With low antecedent soil moisture, saturation overland flow dominates in the spring bog. With intermediate or high pre-moisture, interflow is generated. The measured runoff coefficients increase in a nonlinear manner with rising pre-moisture. A soil water tension threshold value near field capacity is the tipping point for nonlinear runoff response. These findings emphasize the impact of the layered structure of the subsurface and of antecedent soil moisture for runoff generation in low mountain ranges and may be useful for establishing flood warning systems.

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Section: Discussionsupporting

confidence: 70%

Hillslope runoff generation influenced by layered subsurface in a headwater catchment in Ore Mountains, Germany

Heller

Kleber

2016

Environ Earth Sci

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“…several hours), the chemical composition of the water that enters the stream might be comparable to the composition of precipitation or throughfall. Furthermore, if the riparian zone is near saturation, which occurs in the relatively flat valley bottoms in NF, only a small fraction of the precipitation can infiltrate and storage capacity is limited, resulting in 5 shallow flow from the riparian zone during rainfall events (von Freyberg et al, 2014;Mosquera et al, 2015). Similar to our study, Chaves et al (2008) found that the precipitation/throughfall end member contributed most to streamflow in a forested Amazonian catchment.…”

Section: Dominant Water Sources 20supporting

confidence: 83%

Land use alters dominant water sources and flow paths in tropical montane catchments in East Africa

Jacobs¹,

Timbe²,

Weeser³

et al. 2018

Preprint

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Abstract. Conversion of natural forest to other land uses could lead to significant changes in catchment hydrology, but the nature of these changes has been insufficiently investigated in tropical montane catchments, especially in Africa. To address 20 this knowledge gap, we identified stream water sources and flow paths in three tropical montane sub-catchments (27-36 km²) with different land use (natural forest, smallholder agriculture and commercial tea plantations) within a 1 021 km² catchment in the Mau Forest Complex, Kenya. Weekly samples were collected from stream water, precipitation and soil water for 75 weeks and analysed for stable water isotopes (δ 2 H and δ 18 O) for mean transit time estimation, whereas trace element samples from stream water and potential end members were collected over a period of 55 weeks for end member mixing analysis. 25Stream water mean transit time was similar (~4 years) in the three sub-catchments, and ranged from 3.2-3.3 weeks in forest soils and 4.5-7.9 weeks in pasture soils at 15 cm depth to 10.4-10.8 weeks in pasture soils at 50 cm depth. The contribution of springs and wetlands to stream discharge increased from 18, 1 and 48 % during low flow to 22, 51 and 65 % during high flow in the natural forest, smallholder agriculture and tea plantation sub-catchments, respectively. The dominant stream water source in the tea plantation sub-catchment was spring water (56 %), while precipitation was dominant in the smallholder 30 agriculture (59 %) and natural forest (45 %) sub-catchments. These results confirm that catchment hydrology is strongly influenced by land use, which could have serious consequences for water-related ecosystem services, such as provision of clean water.Hydrol. Earth Syst. Sci. Discuss., https://doi

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“…Clockwise loops and complex-shaped loops with a water table peak preceding streamflow peak were rarely found and were more typical of large rainfall events and/or wet moisture conditions. Other studies analysed the temporal and spatial variation of hysteresis (e.g., Detty and McGuire, 2008;McGuire and McDonnell, 2010) highlighting the role of hillslopes in runoff generation during wet periods and for large rainfall events (Ocampo et al, 2006;von Freyberg et al, 2014). At LCC, we observed similar hysteretic relations between depth to water table and streamflow.…”

Section: Long-term Monitoring In the Rio Vaduz Catchment Italy Figursupporting

confidence: 79%

Runoff generation in mountain catchments: long-term hydrological monitoring in the Rio Vauz Catchment, Italy

Zuecco

Penna

Borga

2018

CIG

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Implications of hydrologic connectivity between hillslopes and riparian zones on streamflow composition

Cited by 55 publications

References 48 publications

Hillslope runoff generation influenced by layered subsurface in a headwater catchment in Ore Mountains, Germany

Hillslope runoff generation influenced by layered subsurface in a headwater catchment in Ore Mountains, Germany

Land use alters dominant water sources and flow paths in tropical montane catchments in East Africa

Runoff generation in mountain catchments: long-term hydrological monitoring in the Rio Vauz Catchment, Italy

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