Effective water quantity of multi-source water recharging aquifers in Yufuhe River based on groundwater and surface water semi-coupled modelling

2019 ◽  
Vol 19 (8) ◽  
pp. 2280-2287
Author(s):  
Wenliang Li ◽  
Qing Sun ◽  
Weiping Wang ◽  
Shisong Qu ◽  
Zhengxian Zhang ◽  
...  
Keyword(s):  
River Flow ◽  
Water Volume ◽  
Karst Water ◽  
Karst Aquifers ◽  
Volume Data ◽  
Aquifer Recharge ◽  
Recharge Rate ◽  
Coupled Modelling ◽  
Water Recharge ◽  
Spring Catchment

Abstract With rapid urbanisation, a karst water recharge area of the Jinan spring catchment was damaged. Thus, managed aquifer recharge projects were built in the western Jinan spring catchment to protect the water supply of the spring. Yufuhe River was selected as the study area to compute the effective recharge rate into karst aquifers. This strong seepage zone has a large gradient and undergoes a specific hydrogeological condition in which two strata of a gravel layer and limestone change to three strata of gravel, impermeable clay shale and limestone at the open window of the karst aquifers. A hydraulic model called HEC-RAS was applied to simulate the river stage, and a numerical groundwater model called HYDRUS-3D was adopted to simulate the groundwater mound dynamics and estimate river flow seepage into the aquifers. The effective recharge rates are 64.9%, 65.2% and 68.1% when the buried depths of groundwater are 40, 30 and 25 m. An analysis of the electric conductivity, water table, temperature and water volume data found an effective recharge rate of 68.3%. Results of field monitoring confirmed the accuracy of the numerical simulation and showed that most of the recharged water in the study reach can be effectively recharged into the karst aquifers.

Using stable isotopes to estimate the time since disconnection of pools in temporary rivers 

2021 ◽  
Author(s):  
Pilar Llorens ◽  
Sebastián González ◽  
Jérôme Latron ◽  
Cesc Múrria ◽  
Núria Bonada ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Isotopic Composition ◽  
River Flow ◽  
Meteorological Data ◽  
Global Network ◽  
Balance Model ◽  
Water Volume ◽  
Ecological Quality ◽  
Temporary Rivers ◽  
Hydrological Variable

<p>Temporary rivers, characterized by shifts between flowing water, disconnected pools and dry periods, represent over 50% of the world’s river network and future climatic projections suggest their increase. These rivers are understudied, especially when only disconnected pools remain, because gauging stations or hydrological models do not inform of what happens after the cessation of flow. In addition, most of biological indicators for water quality are designed for flowing waters and their adequacy for temporary rivers is uncertain.</p><p>The development of biological metrics adequate for the assessment of disconnected pools is difficult, because the high species replacement during and following flow cessation. For this reason, one hydrological variable of paramount importance for the assessment of ecological quality of disconected pools is the time since disconnection from the river flow.</p><p>The objective of our work is to present a methodology to estimate the time since disconnection of pools from the river flow. This methodology, following the Gonfiantini (1986) model, is based on the sampling of water stable isotopes in disconnected pools. For pools disconnected from the groundwater, knowing the isotopic modification of the water in time due to evaporation, allows to estimate the relative volume of water evaporated since the pool has been disconnected. However, this approach gets complicated when pools have relevant rainfall inputs or exchanges with groundwater.</p><p>Within the Vallcebre research area (42º12’N and 1º49’E), two artificial pools, one covered with a transparent lid to prevent the input of rainfall and another uncovered, were installed to validate this methodology in controlled conditions. From July to November 2020, water volume of these pools were weekly measured and sampled for isotopic analysis. In parallel, meteorological variables were monitored and rainfall was also sampled for water stable isotopes.</p><p>To develop and validate an operational methodology for estimating the time since disconnection, we first calculated the relative amount of evaporated water based on the variations of isotopic composition of the covered pool samples, and estimated the time since disconnection (for a given natural pool) using the potential evaporation calculated from the meteorological data. For the uncovered pool, the information of amount and isotopic composition of rainfall was added in a mass balance model. Additionally, the same estimations were calculated with standard information (i.e. the meteorological data obtained from the National Meteorological Service and precipitation isotopes data from the Global Network of Isotopes in Precipitation (GNIP) of the International Atomic Energy Agency). Finally, measured volumes changes in pools, were used to assess the limitations of the operational methodology and the sensitivity of the results to meteorological conditions.</p><p>Our approach suggests that changes in isotopic composition can be a reliable method to estimate time since disconnection of pools in temporary rivers to better assess their ecological quality.</p>

Natural superficial water storage and aquifer recharge assessment in Brazilian savanna wetland using unmanned aerial vehicle and geophysical survey

2020 ◽  
Vol 8 (3) ◽  
pp. 224-244
Author(s):  
Lucas Moreira Furlan ◽  
Vania Rosolen ◽  
Jepherson Salles ◽  
César Augusto Moreira ◽  
Manuel Eduardo Ferreira ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Agricultural Land ◽  
Water Volume ◽  
Surface Model ◽  
Aquifer Recharge ◽  
Flow Paths ◽  
Subsurface Structures ◽  
Aerial Vehicle ◽  
High Resolution Images ◽  
Remote Sensing Techniques

Human pressure on the water resources provided by natural isolated wetlands has intensified in Brazil due to an increase in agricultural land equipped with irrigation. However, the amount of water stored in these areas and its contribution to aquifer recharge is unknown. This study aimed to quantify the amount of water that can be retained in a natural wetland and to propose a model of groundwater recharge. We used remote sensing techniques involving unmanned aerial vehicle to map the wetland and highlight its internal morphology, using a red–green–blue orthomosaic and a digital surface model. The 2-D inversion and a pseudo-3-D model from electrical resistivity tomography data were used to visualize the subsurface structures and hydrologic flow paths. The wetland is a reservoir storing up to 416.996 m3 of water during the rainy months. Distinct internal compartments characterize the wetland topography and different water-volume storage, lower in the border and higher in the center. A leakage point connects surface water to groundwater through direct vertical flow, which constitutes the aquifer recharge zone. Remotely sensed very high-resolution images allied with geophysical techniques allowed complete surface and subsurface imaging and offered visual tools that contributed to understanding the hydrodynamics of the wetland.

Time-lapse photography for monitoring reservoir leakages (Montejaque dam, Andalusia, southern Spain)

2017 ◽  
Vol 49 (1) ◽  
pp. 281-290 ◽  
Author(s):  
Santiago García-López ◽  
Verónica Ruiz-Ortiz ◽  
Juan José Muñoz-Pérez
Keyword(s):  
Water Level ◽  
River Flow ◽  
Digital Terrain Model ◽  
Time Lapse ◽  
Water Levels ◽  
Water Volume ◽  
Climate Data ◽  
Calcite Dissolution ◽  
Terrain Model ◽  
Use Of Time

Abstract A methodology based on the use of time-lapse photographs is presented to evaluate the leakages over time of a reservoir (Montejaque dam, Málaga Province, Spain) that feeds a karstic aquifer. In particular, photographic control allows the evolution of water levels in the dam and the river that feeds it to be monitored. Through changes in water volume, which are calculated from the level differences, daily leakages are evaluated, and the relationship between leakages and the water level of the reservoir is established. The proposed method includes adjusting the hydric balance and the use of digital terrain model and climate data. The inputs (river flow and direct precipitation) and other outputs (direct evaporation) are also evaluated. Values between 4 m3/s and 0.35 m3/s are obtained for the reservoir infiltration, clearly superior to the values obtained at the time of the construction of the dam in the 1920s. Mobilisation of the filling of fractures and conduits in karstic massif and calcite dissolution are processes that can influence this behaviour. When the water level is very low, the obtained values are below the historical leakages due to deposition of clay sediments at the reservoir bottom.

scholarly journals Groundwater Recharge Assessment using Geographic Information System APLIS Method in Donorojo Karst Area, Pacitan

2021 ◽  
Vol 936 (1) ◽  
pp. 012027
Author(s):  
P V Hardyani ◽  
A S Bahri ◽  
T Hariyanto ◽  
W W Parnadi ◽  
Y Rosandi ◽  
...  
Keyword(s):  
Information System ◽  
Spatial Distribution ◽  
Groundwater Recharge ◽  
Geographical Information ◽  
Karst Area ◽  
Karst Aquifers ◽  
Recharge Rate ◽  
Recharge Rates ◽  
Groundwater Recharge Rate ◽  
Aplis Method

Abstract Karst aquifers can be a source of water supply, especially for the community in Donorojo District, which is one of the areas with the worst drought crisis in Pacitan Regency and requires a sustainable solution to the problem of water needs. Therefore, the study and management of karst formations are very important because of their abundance and potential in forming subsurface aquifer karst aquifers. The recharge rate is one of the basic parameters in the management of the consumption and maintenance of this resource. In addition, the distribution of aquifer locations, aquifer characteristics, and the quality of groundwater forming the aquifer need to be known. This study aims to assess aquifers in the Karst area of Donorojo, Pacitan based on recharge rate and spatial distribution. The APLIS method can estimate surface recharge rates and present the results as a map of the spatial distribution of aquifer recharge rates by utilizing a Geographical Information System (GIS). The results of the analysis using the APLIS method, the groundwater recharge rate in the Donorojo Pacitan karst area is divided into 4 classes, namely very low, low, moderate, and high. Almost the entire Donorojo karst area has a high groundwater recharge rate, this means that the area needs to be used as a groundwater protection zone and it is important to carry out good groundwater management, especially to overcome the problem of drought.

scholarly journals Cuantificación de la recarga de agua en el sistema de riego Catarama mediante Modelo Renata

2019 ◽  
pp. 31
Author(s):  
Govanny Jiménez Valencia ◽  
John Enrique Félix Mera ◽  
Jose Ramón Alarcón Loor
Keyword(s):  
Irrigation System ◽  
System Modeling ◽  
Aquifer Recharge ◽  
Palabras Clave ◽  
El Sistema ◽  
Water Recharge ◽  
Del Rio ◽  
Variable Precipitation ◽  
Different Characteristics ◽  
Climatic Series

Cuantification of Catarama irrigation system recharge by Renata Model Resumen El objetivo de la investigación es cuantificar la recarga de agua generada en el sistema de riego Catarama (Cuenca del río Catarama) perteneciente a la provincia de Los Ríos (Ecuador), mediante la aplicación del modelo numérico RENATA (Recarga NATural a los Acuíferos) desarrollado por el Instituto Geológico y Minero de España (IGME) y la Diputación de Alicante. En el estudio se calculan los volúmenes de agua que son generados por la infiltración ocasionada por la lluvia y por el retorno de riego proveniente de las dotaciones de agua asignadas a los diferentes cultivos existentes en la zona. Para la determinación de la recarga se consideraron diferentes variables climáticas influyentes como precipitación, temperatura, evapotranspiración potencial y real; así como las diferentes características de los suelos del sector. A partir de estas variables RENATA pudo generar los resultados de la modelación en el sistema de riego, en base a los datos obtenidos de series climáticas mensuales correspondientes al periodo enero 2005 - diciembre 2014, obteniendo durante este tiempo una recarga teórica de 57,139 Hm3 en un área total aproximada de 6047 ha. Palabras clave: RENATA; variable; precipitación; recarga; infiltración; riego. Abstract In this article, the water recharge in the Catarama irrigation system (Catarama river basin), Los Ríos, Ecuador is quantified through the application of the RENATA numerical model (Natural Aquifer recharge) developed by the Instituto Geológico y Minero de España (IGME) and Diputación de Alicante. The study calculates the volumes of water generated by the infiltration caused by rainfull and the return of irrigation from the water assigned to the different crops in the area. To determine the recharge, different influential climatic variables were considered: precipitation, temperature, potential and the current evapotranspiration; as well as the different characteristics of the sector’s soils. From these variables, RENATA was able to generate the results of the irrigation system modeling, based on the data obtained from monthly climatic series corresponding to the period January 2005 - December 2014, getting during this time a theoretical recharge of 57,139 Hm3, in an approximate total area of 6047 ha. Keywords: RENATA; Variable; Precipitation; Recharge; Infiltration; Irrigation.

scholarly journals Geophysical and Hydrogeological Investigations of Water Leakage from a Reservoir Dam to a Coastal Aquifer: The Lebna Case Study (Northeastern Tunisia)

2021 ◽  
Author(s):  
Nejmeddine Ouhichi ◽  
Radhouane Hamdi ◽  
Lachaal Fethi ◽  
Hakim GABTNI ◽  
Olivier grunberger
Keyword(s):  
Coastal Aquifer ◽  
Geological Mapping ◽  
Water Volume ◽  
Aquifer Recharge ◽  
Geophysical Research ◽  
Balance Calculation ◽  
Electrical Soundings ◽  
Northeastern Tunisia ◽  
The Right

In semiarid regions, dams are useful for surface water storage, sediment sequestration, and aquifer recharge. Built in 1987 on the Cap Bon peninsula (in northeastern Tunisia), the Lebna Dam is considered a good example of a multifunctional reservoir. The dam feeds two important irrigation networks, stores large sediment quantities, and allows a significant recharge flow to the underlying aquifer. This work suggests new leakage flow and dam-aquifer interaction characterizations through the development of an approach that combines a water balance calculation, geological field observations, groundwater monitoring, and geophysical research. The hydrological balance calculation performed over the 27-year monitoring period, from 1990 to 2017, shows that an estimated water volume of 3.7 Mm3y-1 has leaked from the Lebna reservoir to the coastal aquifer. Geological mapping of the Lebna Dam basin in summer 2019 revealed the existence of permeable layers of sands to sandstones exposed along the southern banks of the reservoir and extending to an elevation that included the water level when the dam is full; these rocks outcrop at approximately 16 m.a.s.l. A geophysical survey based on 67 vertical electrical soundings and 8 electrical resistivity tomography profiles in the area downstream of the reservoir was carried out to identify the lateral continuity of the recharge zones. Piezometric campaigns consisting of four field surveys in 2019 and 2020 were conducted in the region downstream of Lebna Dam, consisting of 71 water well samples. An interpretation of these geophysical data coupled with available borehole logging and piezometric measurements was used to define the leakage geometry from the reservoir dam to the coastal aquifer. The collected evidence led to the conclusion that concentrated recharge occurs in the downstream sections, especially on the right bank of the aquifer.

scholarly journals An Overview of Managed Aquifer Recharge in Mexico and Its Legal Framework

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 474 ◽  
Author(s):  
Mary Belle Cruz-Ayala ◽  
Sharon B. Megdal
Keyword(s):  
Arid Regions ◽  
Legal Framework ◽  
Managed Aquifer Recharge ◽  
Human Consumption ◽  
Aquifer Recharge ◽  
Pilot Projects ◽  
Challenges And Opportunities ◽  
Water Recharge ◽  
Technical Issues ◽  
Policies And Programs

In Mexico, one hundred of the 188 most important aquifers dedicated to agriculture and human consumption are over-exploited and 32 are affected by seawater intrusion in coastal areas. Considering that Mexico relies on groundwater, it is vital to develop a portfolio of alternatives to recover aquifers and examine policies and programs regarding reclaimed water and stormwater. Managed Aquifer Recharge (MAR) may be useful for increasing water availability and adapting to climate change in semi-arid regions of Mexico. In this paper, we present an overview of water recharge projects that have been conducted in Mexico in the last 50 years, their methods for recharge, water sources, geographical distribution, and the main results obtained in each project. We found three types of MAR efforts: (1) exploratory and suitability studies for MAR, (2) pilot projects, and (3) MAR facilities that currently operate. This study includes the examination of the legal framework for MAR to identify some challenges and opportunities that Mexican regulation contains in this regard. We find that beyond the technical issues that MAR projects normally address, the regulatory framework is a barrier to increasing MAR facilities in Mexico.

scholarly journals Representation of water abstraction from a karst conduit with numerical discrete-continuum models

2014 ◽  
Vol 18 (1) ◽  
pp. 227-241 ◽  
Author(s):  
T. Reimann ◽  
M. Giese ◽  
T. Geyer ◽  
R. Liedl ◽  
J. C. Maréchal ◽  
...  
Keyword(s):  
Boundary Condition ◽  
Large Scale ◽  
Pumping Test ◽  
Karst Water ◽  
Karst Aquifers ◽  
Flow Process ◽  
Conduit Flow ◽  
Water Abstraction ◽  
Model Studies ◽  
Karst Conduit

Abstract. Karst aquifers are characterized by highly conductive conduit flow paths embedded in a less conductive fissured and fractured matrix, resulting in strong permeability contrasts with structured heterogeneity and anisotropy. Groundwater storage occurs predominantly in the fissured matrix. Hence, most mathematical karst models assume quasi-steady-state flow in conduits neglecting conduit-associated drainable storage (CADS). The concept of CADS considers storage volumes, where karst water is not part of the active flow system but hydraulically connected to conduits (for example karstic voids and large fractures). The disregard of conduit storage can be inappropriate when direct water abstraction from karst conduits occurs, e.g., large-scale pumping. In such cases, CADS may be relevant. Furthermore, the typical fixed-head boundary condition at the karst outlet can be inadequate for water abstraction scenarios because unhampered water inflow is possible. The objective of this work is to analyze the significance of CADS and flow-limited boundary conditions on the hydraulic behavior of karst aquifers in water abstraction scenarios. To this end, the numerical discrete-continuum model MODFLOW-2005 Conduit Flow Process Mode 1 (CFPM1) is enhanced to account for CADS. Additionally, a fixed-head limited-flow (FHLQ) boundary condition is added that limits inflow from constant head boundaries to a user-defined threshold. The effects and the proper functioning of these modifications are demonstrated by simplified model studies. Both enhancements, CADS and FHLQ boundary, are shown to be useful for water abstraction scenarios within karst aquifers. An idealized representation of a large-scale pumping test in a karst conduit is used to demonstrate that the enhanced CFPM1 is able to adequately represent water abstraction processes in both the conduits and the matrix of real karst systems, as illustrated by its application to the Cent Fonts karst system.

Remedial strategy of algal proliferation in a regulated river system by integrated hydrological control: an evolutionary modelling framework

2014 ◽  
Vol 65 (5) ◽  
pp. 379 ◽  
Author(s):  
Dong-Gyun Hong ◽  
Kwang-Seuk Jeong ◽  
Dong-Kyun Kim ◽  
Gea-Jae Joo
Keyword(s):  
Chlorophyll A ◽  
Phytoplankton Biomass ◽  
River Flow ◽  
Winter Season ◽  
River System ◽  
Regulated River ◽  
Water Volume ◽  
Ample Evidence ◽  
Chlorophyll A Concentration ◽  
Rule Set

We simulated water-quality measures in a regulated river system (the lower Nakdong River) under simultaneous discharge control at upriver dams and an estuarine barrage with the goal of reducing phytoplankton biomass (chlorophyll a concentration). We used genetic programming (GP) to create a rule-set-based predictive model for the chlorophyll a concentration based on 16 years (1994–2009) of meteorological, hydrological, and limnological data. The rule-set model used eight variables, including water temperature, dam and estuarine barrage discharge, phosphate and silica concentrations, and accurately predicted the phytoplankton biomass (determination coefficients, r2, for training and test data were 0.52 and 0.45, respectively). According to sensitivity and scenario analyses, a larger water volume resulting from increased discharge from upriver dams and decreased discharge from an estuarine barrage would reduce chlorophyll a concentrations at the study site. This result provided ample evidence that simultaneous manipulation of dam and estuarine discharge rates could effectively increase river flow and flush aggregated algal populations downstream. Additionally, we considered that even small increases in river flow could play a role in diluting phytoplankton biomass during the dry winter season when estuarine discharge remains low. These two hydrological mechanisms could be used as selective strategies for water-resource management.

Options for managed aquifer recharge of karst aquifer of Vis island (Croatia)

2021 ◽  
Author(s):  
Staša Borović ◽  
Matko Patekar ◽  
Josip Terzić ◽  
Marco Pola ◽  
Marina Filipović ◽  
...  
Keyword(s):  
Karst Aquifer ◽  
Seismic Refraction ◽  
Geophysical Methods ◽  
Managed Aquifer Recharge ◽  
Water Levels ◽  
Karst Region ◽  
Karst Aquifers ◽  
Aquifer Recharge ◽  
Drinking Water Resources ◽  
Karst Landforms

<p>Vis, a small remote island in the Adriatic Sea, inhabited since the time of ancient Greeks and Romans, exhibits a unique historical and natural environment. With an area of 89.7 km<sup>2</sup>, the island is mostly composed of karstified carbonate rocks and belongs to Dinaric karst region, locus typicus for karst landforms. Its distance from the mainland is around 50 km from the city of Split, 147 km from the Italian coastline and 18 km from neighbouring Hvar island. The climate on the island is Mediterranean with dry and hot summer and mild, rainy and humid winter (Csa). Vis island, due to its remote location, is not connected to the mainland by submarine water pipeline so it has autonomous water supply due to favourable geological and hydrological conditions which enabled the formation of excellent karst aquifers. The majority of water is abstracted from drilled wells in the central part of the island (Korita extraction site), around 40 l/s, while additional quantities are obtained from coastal spring of Pizdica. Although predominantly of good quality, existing groundwater quantities on Vis are extremely vulnerable to the effects of climate change, namely increase in temperature, quantitative and temporal variability in precipitation trends as well as seawater intrusion. Moreover, Vis island is an attractive location for summer bathing tourism which causes the highest pressure on drinking water resources precisely during the hydrological minimum. An idea to apply artificial recharge of karst aquifer on Vis emerged during the 1970s, however, only on the theoretical level.</p><p>Through the scope of the DEEPWATER-CE project, funded by Interreg Central Europe Programme, the aim is to develop implementation frame for managed aquifer recharge (MAR) solutions. Simplified, MAR is a process by which excess surface water is directed into the ground — either by spreading on the surface, by using recharge wells, or by altering natural conditions to increase infiltration to replenish an aquifer (DILLON et al., 2019). Globally, various designs of MAR schemes have successfully been implemented in unconsolidated aquifers, but there is little experience with artificially recharging karst aquifers (ROLF, 2017). A particular challenge for the technical implementation and operation of MAR is posed by strong hydraulic anisotropy and heterogeneity of karst aquifers and by their high vulnerability to contamination (XANKE, 2017). To investigate whether a MAR operation is feasible and suitable for karst aquifer on Vis, a detailed field and laboratory investigations were carried out. Field investigations included in-situ measurements of physicochemical parameters on water samples from springs and boreholes, groundwater monitoring (conductivity, temperature and water levels), geophysical methods (ERT, magnetotellurics, and seismic refraction) and structural measurements. Laboratory analyses included measurements of stabile water isotopes, and principal cations and anions. Hence, by conducting extensive investigations, coupled with historical data and previous research, a foundation for implementing efficient and sustainable management of karst aquifer through MAR on Vis island will be provided. </p>

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