Management Options to Address Diffuse Causes of Hydrologic Alteration

Horne, Avril; Morris, C.; Fowler, Keirnan; Costelloe, Justin F.; Fletcher, Tim D.

doi:10.1016/b978-0-12-803907-6.00020-6

Cited by 4 publications

(3 citation statements)

References 80 publications

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“…Consequently, there is a tendency for many SAI owners to consider them a “right”, and therefore any attempt to regulate or limit future development can be controversial (Horne et al . 2017). The large number of individual SAIs requires consultation and engagement with an equally large number of individual owners.…”

Section: Management Challengesmentioning

confidence: 99%

Small artificial impoundments have big implications for hydrology and freshwater biodiversity

Morden

Horne

Bond

et al. 2022

Frontiers in Ecol & Environ

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Headwater streams are critical for freshwater ecosystems. Global and continental studies consistently show major dams as dominant sources of hydrological stress threatening biodiversity in the world’s major rivers, but cumulative impacts from small artificial impoundments (SAIs) concentrated in headwater streams have rarely been acknowledged. Using the Murray Darling River basin (Australia) and the Arkansas River basin (US) as case studies, we examined the hydrological impacts of SAIs. The extent of their influence is considerable, altering hydrology in 280–380% more waterways as compared to major dams. Hydrological impacts are concentrated in smaller streams (catchment area <100 km2), raising concerns that the often diverse and highly endemic biota found in these systems may be under threat. Adjusting existing biodiversity planning and management approaches to address the cumulative effects of many small and widely distributed artificial impoundments presents a rapidly emerging challenge for ecologically sustainable water management.

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Section: Management Challengesmentioning

confidence: 99%

Small artificial impoundments have big implications for hydrology and freshwater biodiversity

Morden

Horne

Bond

et al. 2022

Frontiers in Ecol & Environ

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show abstract

“…Historically, in most parts of the world SAIs could be built with little regulation or consideration of potential environmental impacts, although some jurisdictions have in recent years introduced controls on the construction of new SAIs (Morris et al 2019). This means that there is a tendency for many owners of SAIs to consider them a 'right', and that any attempt to regulate or limit future development can be controversial (Horne et al 2017). The large number of individual SAIs requires consultation and engagement with thean equally large number of individual owners.…”

Section: Management Challengesmentioning

confidence: 99%

Small artificial impoundments have big implications for hydrology and freshwater biodiversity

Morden¹,

Horne²,

Bond³

et al. 2022

Preprint

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Headwater streams are critical for freshwater ecosystems. Global and continental studies consistently show major dams as dominant sources of hydrological stress threatening biodiversity in the world’s major rivers, but cumulative impacts from small artificial impoundments concentrated in headwater streams have rarely been acknowledged. Using the Murray Darling River basin (Australia)and the Arkansas River basin (USA) as case studies, we examine the hydrological impact of small artificial impoundments. The extent of their influence is significant, altering hydrology in 280 - 380% more waterways when compared to major dams alone. Hydrological impacts are concentrated in smaller streams (catchment area < 100 km2), raising concerns that the often diverse and highly endemic biota found in these systems may be under threat. Adjusting existing biodiversity planning and management approaches to address the cumulative effects of many small and widely distributed artificial impoundments presents a rapidly emerging challenge for ecologically sustainable water management.

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“…Excessive groundwater extraction from these aquifers, mostly for irrigated oasis agriculture, has resulted in a general reduction in piezometric head as well as groundwater quality deterioration (Pringle and Triska 2000). Indeed, the water level in the two systems is consistently reducing as a result of the continual pumping out, while the pumping expense is increasing; the natural exits are drying up (Horne et al 2017). On the other hand, it was discovered that pumping in one speci c point had repercussions on the other parts of the sheet, and the interactions between the different points of the basin are sometimes very important.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Stables Isotopes to the Study of the Groundwater Recharge in the Southern Foothills of the Saharan Atlas: The case of Tolga Region, North Eastern Algeria

Zouaoui

Menani

Gaagai

et al. 2022

Preprint

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Tolga groundwater is one of Biskra's most important water supplies for both drinking and agriculture. The purpose of this study is to assess the hydrochemical and isotope (2H and 18O) signature of water in the Tolga area. To evaluate the hydrogeology of groundwater in the Tolga region, a chemical, piezometric, and isotopic research was employed. The results of the Piper diagram revealed that there is just one major hydrochemical facies in the research region, which corresponds to Ca–Mg–Cl–SO4. The piezometry of limestone sheets shows that as one goes westward, the turns become less substantial, with turns about 20 meters and a piezometric level of 140 m. For the first time, the local meteoric water line (LMWL) was drawn for Complexe Teminal (CT) and Continental Intercalaire (CI) on Tolga groundwater. The Tolga area LMWL refers to the equation δ2H= 7,18 δ18O + 4.17 with R2 about 0.85. CI and CT measurement locations indicate deuterium excess values ranging from 8.35 to 12.57. Indeed, the majority of values were more than 10‰ (mean of 10.36 ± 2.01‰). Furthermore, waters from Eocene have an isotopic composition of -7.57 ± 0.68‰ in δ18O and − 49.04 ± 4.69‰ In δ2H. The results of the sample characterisation analysis show that the majority of the groundwater samples analysed are of the Ca-Mg-SO4 water type. In addition, the intense exploitation aquifer water and the region's arid climatic conditions resulted in a large decrease in the piezometric limestone level. Finely, the signature of 2H and 18O data indicate that water comes from local precipitation and recent water, and groundwater recharge is influenced by quick infiltration.

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Management Options to Address Diffuse Causes of Hydrologic Alteration

Cited by 4 publications

References 80 publications

Small artificial impoundments have big implications for hydrology and freshwater biodiversity

Small artificial impoundments have big implications for hydrology and freshwater biodiversity

Small artificial impoundments have big implications for hydrology and freshwater biodiversity

Contribution of Stables Isotopes to the Study of the Groundwater Recharge in the Southern Foothills of the Saharan Atlas: The case of Tolga Region, North Eastern Algeria

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