Reduced Soil Macropores and Forest Cover Reduce Warm‐Season Baseflow below Ecological Thresholds in the Upper Delaware River Basin

Endreny, Theodore A.; Kwon, P. Y. S.; Williamson, Tanja N.; Evans, Richard

doi:10.1111/1752-1688.12777

Cited by 5 publications

(4 citation statements)

References 59 publications

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“…This study has comparable results with recent studies globally which developed analytical connections between flow alterations and ecological responses (in testing the ELOHA framework) and suggested restoration possibilities [57][58][59]. Hence, results from this study indicate that the Gumara River and associated wetlands need restoration of ecologically relevant environmental flow components (large flood, small flood, high flow pulse, low flow and extreme low flow) to reverse the deterioration of the aquatic ecosystems in the river-wetland-lake interconnections.…”

Section: Sn Fish Speciessupporting

confidence: 83%

Hydrological Foundation as a Basis for a Holistic Environmental Flow Assessment of Tropical Highland Rivers in Ethiopia

Abebe

Tilahun

Moges

et al. 2020

Water

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The sustainable development of water resources includes retaining some amount of the natural flow regime in water bodies to protect and maintain aquatic ecosystem health and the human livelihoods and wellbeing dependent upon them. Although assessment of environmental flows is now occurring globally, limited studies have been carried out in the Ethiopian highlands, especially studies to understand flow-ecological response relationships. This paper establishes a hydrological foundation of Gumara River from an ecological perspective. The data analysis followed three steps: first, determination of the current flow regime—flow indices and ecologically relevant flow regime; second, naturalization of the current flow regime—looking at how flow regime is changing; and, finally, an initial exploration of flow linkages with ecological processes. Flow data of Gumara River from 1973 to 2018 are used for the analysis. Monthly low flow occurred from December to June; the lowest being in March, with a median flow of 4.0 m3 s−1. Monthly high flow occurred from July to November; the highest being in August, with a median flow of 236 m3 s−1. 1-Day low flows decreased from 1.55 m3 s−1 in 1973 to 0.16 m3 s−1 in 2018, and 90-Day (seasonal) low flow decreased from 4.9 m3 s−1 in 1973 to 2.04 m3 s−1 in 2018. The Mann–Kendall trend test indicated that the decrease in low flow was significant for both durations at α = 0.05. A similar trend is indicated for both durations of high flow. The decrease in both low flows and high flows is attributed to the expansion of pump irrigation by 29 km2 and expansion of plantations, which resulted in an increase of NDVI from 0.25 in 2000 to 0.29 in 2019. In addition, an analysis of environmental flow components revealed that only four “large floods” appeared in the last 46 years; no “large flood” occurred after 1988. Lacking “large floods” which inundate floodplain wetlands has resulted in early disconnection of floodplain wetlands from the river and the lake; which has impacts on breeding and nursery habitat shrinkage for migratory fish species in Lake Tana. On the other hand, the extreme decrease in “low flow” components has impacts on predators, reducing their mobility and ability to access prey concentrated in smaller pools. These results serve as the hydrological foundation for continued studies in the Gumara catchment, with the eventual goal of quantifying environmental flow requirements.

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Section: Sn Fish Speciessupporting

confidence: 83%

Hydrological Foundation as a Basis for a Holistic Environmental Flow Assessment of Tropical Highland Rivers in Ethiopia

Abebe

Tilahun

Moges

et al. 2020

Water

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“…For instance, the classic work by Bosch and Hewlett [19] and the more recent study by Best et al [20], Andréassian [21] and Brown et al [22], predicted that in general, the establishment of forest plantations on old agricultural lands, and the forest growth, affect runoff by reducing the flow rates and the runoff yield, especially during the dry season (see more examples in [15,18,23]. Several field studies showing greater forest cover leads to higher flows over the lower part of the runoff duration curves [48][49][50][51]. This research does not show that greater forest cover corresponded to higher runoff over the lower part of the RDC.…”

Section: Effects Of Land Use and Climate Scenariosmentioning

confidence: 97%

“…However, it suggests that lower forest cover (partial harvest) leads to higher runoff under the "dry season calibration". This increase is the result of a better representation of peak runoff, and the partial harvest of forest led to greater runoff via reduced evapotranspiration [51][52][53][54].…”

Section: Effects Of Land Use and Climate Scenariosmentioning

confidence: 99%

Modelling the Effects of Changes in Forest Cover and Climate on Hydrology of Headwater Catchments in South-Central Chile

Barrientos

Herrero

Iroumé

et al. 2020

Water

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This study analyses the changes in the runoff of forested experimental catchments in south-central Chile, to determine to what extent observed trends can be attributed to effects of intensive forestry and/or climate change. For this, we applied the distributed TETIS® model to eight catchments (7.1−413.6 ha) representative of the land uses and forestry activities in this geographical area. Rainfall and runoff data collected between 2008 and 2015 were used for modelling calibration and validation. Simulation of three land uses (current cover, partial harvest and native forest) and 25 combinations of climatic scenarios (percentage increases or decreases of up to 20% of rainfall and evapotranspiration relative to the no-change scenario applied to input series) were used in each calibration. We found that changes in land use and climate had contrasting effects on runoff. Smaller catchments affected by the driest climatic scenarios experienced higher runoff when the forest cover was lower than under full forest cover (plantations or native forests). In contrast, larger catchments under all climatic scenarios yielded higher runoff below the full forest cover than under partial harvest and native forest. This suggests that runoff can be influenced, to a great extent, by rainfall decrease and evapotranspiration increase, with the model predicting up to a 60% decrease in runoff yield for the dry’s climatic scenario. This study proves to be relevant to inform ongoing discussions related to forest management in Chile, and is intended to minimize the impact of forest cover on runoff yield under uncertain climatic scenarios.

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“…The forest cover continues to decline, esspecialy in the upstream region, that as a catchment area. There is under threat of destruction accompanied by loss of ecological function, because it turns into an economic function (Endreny et al 2019). The weakness of the government and the inability of the forest police to deal with large-capital timber businesspeople are due to the lack of concern for forest safety.…”

Section: Discussionmentioning

confidence: 99%

Deforestation as a catalyst for natural disaster and community suffering: A cycle in the socioecological system

Golar,

Muis,

Isrun

et al. 2024

Folia Forestalia Polonica

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Lore Lindu National Park (LLNP) is a conservation area that contains a lot of wood resources. Various illegal community activities have become widespread, such as illegal mining and illegal logging. So, this research aims to determine the involvement of communities around forest areas in material and wood theft from June to October 2021. To determine forest encroachment, we find explanatory variables, using qualitative description integrated with perceptual tests and Classification and Regression Tree (CART) analysis. Based on the results of the 10-fold cross-validation analysis with the smallest Rcv (x-Val relative error) value of 0.428, with a classification accuracy of 68.6%, a four-node optimum tree was obtained, which explained that as many as 86 forest encroachers were victims of a vast landslide disaster along with flood and whirlwind, due to which there was no longer any property left for them. Their encroachment affected the condition of land cover. The data on the land cover change, from 2010 to 2020, showed a reduction of 15,369.20 ha or 6.90%, which indicated a severe threat to the sustainability of LLNP as a biodiversity conservation area that should be protected. The involvement in illegal logging by communities living around the forest areas resulted from the loss of their agricultural land for their livelihoods due to natural disasters such as flood, landslide and whirlwind that destroyed infrastructure and community settlement facilities. As a result, these losses and destruction were a catalyst for forest destruction. Initially being in the frontline for preserving the forest, however, the community has now turned into silent partners with licensed wood businesspeople. The community eventually becomes a subsystem in the social ecology system (SES), which negatively affects the destruction of forest resources, production and conservation forests.

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Reduced Soil Macropores and Forest Cover Reduce Warm‐Season Baseflow below Ecological Thresholds in the Upper Delaware River Basin

Cited by 5 publications

References 59 publications

Hydrological Foundation as a Basis for a Holistic Environmental Flow Assessment of Tropical Highland Rivers in Ethiopia

Hydrological Foundation as a Basis for a Holistic Environmental Flow Assessment of Tropical Highland Rivers in Ethiopia

Modelling the Effects of Changes in Forest Cover and Climate on Hydrology of Headwater Catchments in South-Central Chile

Deforestation as a catalyst for natural disaster and community suffering: A cycle in the socioecological system

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