An assessment of territory participation in transboundary karst aquifer recharge: A case study from the Skadar Lake catchment area

On Cozumel Island, access to freshwater depends on the extraction of the resource from the aquifer located north of the island (catchment area). Water resource management on the island must be based on updated knowledge of the indicator dynamics related to the recharge of the aquifer, groundwater extraction and the distribution of the resource. In this study, trends, variations and time series of 30 years of monthly data for precipitation, temperature, evapotranspiration, and estimated aquifer recharge were calculated for the catchment area. Additionally, groundwater extraction, water consumption for the main uses over a 13-year period (monthly data), and the 5-year status of wells were considered. The results show decreasing trends in precipitation and estimated recharge volumes in the catchment area, in addition to increasing trends in mean air temperature, evapotranspiration, water extraction volumes and consumption by the commercial sector for the considered time periods. Additionally, an increase in dejected (77%) and reposed (38%) wells within the catchment area was observed. Evidence from this study suggests a dynamic behaviour of the analysed indicators over time that increases pressure on karstic, Caribbean aquifers for which monthly monitoring and data analysis are encouraged as the basis for adequate management.

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Silicon in ultrafresh groundwater: a case study of the Imandra Lake catchment, The Kola Peninsula

E3S Web of Conferences ◽

10.1051/e3sconf/20199801018 ◽

2019 ◽

Vol 98 ◽

pp. 01018

Author(s):

Natalia V. Guseva ◽

Yuliya G. Kopylova ◽

Daria A Vorobeva ◽

Albina A. Khvashchevskaya ◽

Zinaida A. Evtyugina

Keyword(s):

Kola Peninsula ◽

Catchment Area ◽

Water Exchange ◽

Rock Interaction ◽

Silicon Oxides ◽

Short Period ◽

Lake Catchment ◽

Imandra Lake ◽

Water Rock Interaction

The ultrafresh groundwater (with TDS values less than 200 mg/L) of the Imandra Lake catchment, Kola Peninsula, is from an intensive water exchange zone, where the water has a short period of contact with the rock. Therefore, the considered water is at the initial stages of the water–rock interaction. The water is saturated with respect to oxides and hydroxides of aluminium and iron. In the groundwater of the Imandra Lake catchment area, the silicon concentrations significantly exceed the concentrations of magnesium and especially potassium. Nevertheless, water is undersaturated with respect to with respect to silicon oxides. The shown enrichment of water with cations is explained by time of water-rock interaction.

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Stream modifications to enhance system connectivity for fish habitat compensation: a case study in the Barrenlands region of Canada

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2014-0012 ◽

2014 ◽

Vol 41 (7) ◽

pp. 650-659 ◽

Cited By ~ 5

Author(s):

Gregory Courtice ◽

Abul Basar M. Baki ◽

David Z. Zhu ◽

Christopher Cahill ◽

William M. Tonn

Keyword(s):

Catchment Area ◽

Rectangular Cross Section ◽

Fish Habitat ◽

Fish Passage ◽

First Year ◽

Productive Capacity ◽

Flow Depth ◽

Lake Catchment ◽

Habitat Compensation

This study examines stream modification efforts to increase the productive capacity of an isolated system of three small lakes in the Barrenlands region of Arctic Canada by enhancing system connectivity. The lakes’ outlet streams were modified to create conditions favourable for fish passage and thereby promote migration among the lakes and the large lake into which they drain. Gabion step pools (in two streams) and a nature-like choke-and-pool structure (in one stream) were installed. Two years of post-construction hydraulics data were compared to data collected for two years prior to construction to determine the efficacy of the various stream modifications. Initial evaluations indicated unsuccessful performance of gabion step pools, so after the first year, they were retrofitted with boulders to increase flow depth, restrict discharge, improve flow duration, and create unimpeded connections rather than sudden drops. Variation of lake levels and duration, variability, and depth of stream flow indicated that outlet geometry and lake catchment area should be important considerations when enhancing connectivity for fish migration in ephemeral systems. A narrow, rectangular cross-section was deemed effective for increasing flow depth while decreasing discharge, resulting in increased duration of flows. Catchment area was an effective indicator of a headwater lake’s potential response to connectivity enhancements. Smaller catchments may provide inadequate runoff to sustain minimum storage requirements for enhanced connectivity. Our findings should advance the knowledge of headwater system hydraulics in the Barrenlands and assist in designing future fish habitat compensation projects on similar systems.

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Karst Spring Recharge Areas and Discharge Relationship by Oxygen-18 and Deuterium Isotopes Analyses: A Case Study in Southern Latium Region, Italy

Applied Sciences ◽

10.3390/app10051882 ◽

2020 ◽

Vol 10 (5) ◽

pp. 1882 ◽

Cited By ~ 2

Author(s):

Silvia Iacurto ◽

Gerardo Grelle ◽

Francesco Maria De Filippi ◽

Giuseppe Sappa

Keyword(s):

Probability Function ◽

Isotope Composition ◽

Groundwater Resources ◽

Karst Aquifer ◽

Cumulative Probability ◽

Aquifer Recharge ◽

Groundwater Samples ◽

Simulated Distribution ◽

Deuterium Isotopes

Karst aquifer recharge areas are usually difficult to identify because of the complexity of these aquifers’ characteristics. On the other hand, their identification is very important in the aim of protecting the groundwater resources that these aquifers host. Regarding this topic, this paper presents an approach aimed at identifying karst aquifer recharge areas by the application of oxygen-18 and deuterium isotopes composition of groundwater coupled with hydrological features. Oxygen-18 and deuterium isotope composition of Capodacqua di Spigno Spring, in the South of the Latium Region, has been applied with rainfall and discharge values related to the feeding aquifer of this spring. As δ18O and δ2H values of groundwater samples are natural tracers of the recharge area’s elevation, we propose a model, based on the distribution of the basin surfaces involved as recharge areas, in relation to elevations. The model estimates, for any discharge value, the percentage of the topographic area involved in the aquifer recharge. The setting up of this simulated distribution is supported by a Weibull cumulative probability function. The results show that the measured discharges increase as larger areas with lower elevations are involved in the recharge process.

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Case Study: Scaling Recharge Rates from Pilot Projects of Managed Artificial Aquifer Recharge in the Walla Walla Basin, Oregon

Journal of Hydrologic Engineering ◽

10.1061/(asce)he.1943-5584.0001102 ◽

2015 ◽

Vol 20 (8) ◽

pp. 05014028 ◽

Cited By ~ 2

Author(s):

A. C. Petrides ◽

R. Stewart ◽

R. Bower ◽

R. H. Cuenca ◽

Brian Wolcott

Keyword(s):

Aquifer Recharge ◽

Pilot Projects ◽

Recharge Rates ◽

Artificial Aquifer Recharge ◽

Walla Walla

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Parking Places to Moped-Style Scooter Sharing Services Using GIS Location-Allocation Models and GPS Data

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi10040230 ◽

2021 ◽

Vol 10 (4) ◽

pp. 230

Author(s):

Onel Pérez-Fernández ◽

Juan Carlos García-Palomares

Keyword(s):

Global Positioning System ◽

Catchment Area ◽

Public Spaces ◽

Gps Data ◽

Positioning System ◽

Urban Centers ◽

Location Allocation ◽

Global Positioning ◽

The City

Moped-style scooters are one of the most popular systems of micro-mobility. They are undoubtedly good for the city, as they promote forms of environmentally-friendly mobility, in which flexibility helps prevent traffic build-up in the urban centers where they operate. However, their increasing numbers are also generating conflicts as a result of the bad behavior of users, their unwarranted use in public spaces, and above all their parking. This paper proposes a methodology for finding parking spaces for shared motorcycle services using Geographic information system (GIS) location-allocation models and Global Positioning System (GPS) data. We used the center of Madrid and data from the company Muving (one of the city’s main operators) for our case study. As well as finding the location of parking spaces for motorbikes, our analysis examines how the varying distribution of demand over the course of the day affects the demand allocated to parking spaces. The results demonstrate how reserving a relatively small number of parking spaces for scooters makes it possible to capture over 70% of journeys in the catchment area. The daily variations in the distribution of demand slightly reduce the efficiency of the network of parking spaces in the morning and increase it at night, when demand is strongly focused on the most central areas.

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