From past patterns to future potential: using historical ecology to inform river restoration on an intermittent California river

Beller, Erin E.; Downs, Peter W.; Grossinger, Robin M.; Orr, Bruce K.; Salomon, Micha

doi:10.1007/s10980-015-0264-7

Cited by 17 publications

(19 citation statements)

References 44 publications

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“…Besides, the influence of climate change cannot be overlooked as the predominance of low maxima may also be related to the possible impact of the droughts that occurred in the Duero basin during the 1980s and 1990s (Álvarez‐Rodríguez et al 2016). Similar patterns were found in the historical study by Beller et al (2016) on California coastal rivers where, despite periodic major flood events (and an extensive period of drought), no lateral migration or changes in mainstem width were observed, and riparian forested nodes persisted.…”

Section: Discussionsupporting

confidence: 88%

Assessing multi‐temporal river‐floodplain dynamics as baseline for process‐oriented restoration in a large river: the Duero River, Spain

Diáz-Redondo

Cortés

Molina

et al. 2021

Restoration Ecology

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The time‐based perspective of river‐floodplain processes plays a key role in understanding its evolution until its present situation and in guiding process‐based river restoration. However, despite the wide range of approaches to eco‐hydromorphological characterization, the analysis of fluvial dynamics and their drivers under a temporal perspective requires more investigation. For the present study, a historical analysis of river‐floodplain dynamics has been undertaken in a study section of the Duero River upstream of Zamora (Spain), within the framework of the DRAINAGE project for the integral management of flood risk. Aerial imagery for the period 1945–2017 was used to create habitat maps that were subsequently intersected to identify trajectories of habitat change (anthropization, changeless, progression, and regression). In addition, a Natural Trajectory Index (NTI) and an Anthropization Ratio (AR) were proposed as a way to assess the balance of natural trajectories (progression vs. regression) and the weight of anthropization versus the sum of natural trajectories, respectively. Results show a system with a high degree of stability and anthropization, and a current imbalance of natural trajectories with a predominance of progression in the ecological succession. Rejuvenation processes have to be reactivated through nature‐based solutions, allowing for more sustainable water management practices. This perspective aims at promoting a more resilient system. The diachronic analysis presented is widely exportable to other river‐floodplain systems as a basis for process‐based restoration practice.

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Section: Discussionsupporting

confidence: 88%

Assessing multi‐temporal river‐floodplain dynamics as baseline for process‐oriented restoration in a large river: the Duero River, Spain

Diáz-Redondo

Cortés

Molina

et al. 2021

Restoration Ecology

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“…Other studies retrieved from the literature search used previously orthorectified (e.g., [9,29]) or only georeferenced (e.g., [30][31][32]) images but provided little information on image processing. In other cases, the camera information (metadata) was complete and available (e.g., [33][34][35]), but often there was no reference to the orthorectification process itself (e.g., [36][37][38][39]). More detail is usually given in technical studies dealing specifically with remote sensing, with several authors describing feature-based registration methodologies for historical aerial image orientation and orthorectification, such as the use of TIL (time-invariant lines) (e.g., [17]) or OBIA processes (e.g., [21]).…”

Section: Introductionmentioning

confidence: 99%

From Archived Historical Aerial Imagery to Informative Orthophotos: A Framework for Retrieving the Past in Long-Term Socioecological Research

et al. 2019

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Aerial photographs have been systematically collected from as early as the 1930s, providing a unique resource to describe changes in vegetation and land cover over extended periods of time. However, their use is often limited by technical constraints, such as the lack of ground control information and precise camera parameters, which hamper an accurate orthorectification of the raw imagery. Here, we describe the historical aerial photographs orthorectification (HAPO) workflow, based on a conventional photogrammetric procedure (the direct linear transformation (DLT) Method), integrated as a geographic information systems (GIS) procedure, in order to perform the image orientation and orthorectification, thereby converting historical aerial imagery into high-definition historical orthoimages. HAPO implementation is illustrated with an application to a rugged landscape in Portugal, where we aimed to produce land-cover maps using an aerial photograph coverage from 1947, as part of a study on long-term socioecological dynamics. We show that HAPO produces highly accurate orthoimages and discuss the wider usefulness of our framework in long-term socioecological research.

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“…A combination of steep slopes and intense, isolated periods of rainfall have yielded daily averaged suspended sediment concentration beyond 70,000 mg/L several times throughout the stream gauge record (Warrick and Farnsworth 2009a). While these concentrations may reflect the conditions of a natural southern California watershed during the wet season, dry season conditions are not likely representative of pre-European conditions when the Calleguas Creek drainage density was much smaller and dry season flows typically did not reach the estuary (Beller et al 2011). For example, point source runoff from wastewater treatment plants and construction projects, as well as non-point source runoff from agriculture, can augment dry weather flows in the creek.…”

Section: Regional Settingmentioning

confidence: 99%

Balanced Sediment Fluxes in Southern California’s Mediterranean-Climate Zone Salt Marshes

Rosencranz

Ganju

Ambrose

et al. 2015

Estuaries and Coasts

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Salt marsh elevation and geomorphic stability depends on mineral sedimentation. Many Mediterraneanclimate salt marshes along southern California, USA coast import sediment during El Niño storm events, but sediment fluxes and mechanisms during dry weather are potentially important for marsh stability. We calculated tidal creek sediment fluxes within a highly modified, sediment-starved, 1.5-km 2 salt marsh (Seal Beach) and a less modified 1-km 2 marsh (Mugu) with fluvial sediment supply. We measured salt marsh plain suspended sediment concentration and vertical accretion using single stage samplers and marker horizons. At Seal Beach, a 2014 storm yielded 39 and 28 g/s mean sediment fluxes and imported 12,000 and 8800 kg in a western and eastern channel. Western channel storm imports offset 8700 kg exported during 2 months of dry weather, while eastern channel storm imports augmented 9200 kg imported during dry weather. During the storm at Mugu, suspended sediment concentrations on the marsh plain increased by a factor of four; accretion was 1-2 mm near creek levees. An exceptionally high tide sequence yielded 4.4 g/s mean sediment flux, importing 1700 kg: 20 % of Mugu's dry weather fluxes. Overall, low sediment fluxes were observed, suggesting that these salt marshes are geomorphically stable during dry weather conditions. Results suggest storms and high lunar tides may play large roles, importing sediment and maintaining dry weather sediment flux balances for southern California salt marshes. However, under future climate change and sea level rise scenarios, results suggest that balanced sediment fluxes lead to marsh elevational instability based on estimated mineral sediment deficits.

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From past patterns to future potential: using historical ecology to inform river restoration on an intermittent California river

Cited by 17 publications

References 44 publications

Assessing multi‐temporal river‐floodplain dynamics as baseline for process‐oriented restoration in a large river: the Duero River, Spain

Assessing multi‐temporal river‐floodplain dynamics as baseline for process‐oriented restoration in a large river: the Duero River, Spain

From Archived Historical Aerial Imagery to Informative Orthophotos: A Framework for Retrieving the Past in Long-Term Socioecological Research

Balanced Sediment Fluxes in Southern California’s Mediterranean-Climate Zone Salt Marshes

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