Infiltration in the Corgo River basin (northern Portugal): coupling water balances with rainfall—runoff regressions on a monthly basis

Alencoão, Ana M.P.; Pacheco, Fernando António Leal

doi:10.1623/hysj.51.6.989

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…Then, how is it justified when in some areas there is a high-radon production in the rocks and a reduced radon concentration underground? In order to answer this question, it is important to study the connection between several factors that can increase the radon diffusion from rocks to surface water, namely the weathering of U-bearing minerals under certain specific pH conditions [27][28][29][30][31][32][33][34][35], the weathering rate, rock hydraulic diffusivity [36][37][38][39][40], and the emanation coefficient [41]. The main purpose of this study is to present a new standpoint on the radiological assessment of drinking water based on the relationship between groundwater contamination risk and radon production in rocks.…”

Section: Introductionmentioning

confidence: 99%

An Assessment of Groundwater Contamination Risk with Radon Based on Clustering and Structural Models

Martins

Pereira

Oliveira

et al. 2019

Water

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There is currently some controversy in the scientific community regarding the efficiency of the water–rock interaction process in the contamination of radon in groundwater. In this study, some difficulties were found in the sampling phase. Many of the water collection points are used for human consumption. As such, some municipalities did not want to collaborate. When this natural contaminant is undetectable to the human sense and may cause pulmonary neoplasms in the long term, it is difficult to obtain collaboration from the municipalities concerned. To overcome this controversy, it is important to understand that geogenic, climatic, hydrological, and topographic features may contribute to the effective transfer of radon from rocks to groundwater. In brief, this new approach combines the radon transfer from the geological substrate to the groundwater circulation through hierarchic agglomerative clustering (HAC) and partial least squares-path modeling (PLS-PM) methods. The results show that some lithologies with higher radon production may not always contribute to noticeable groundwater contamination. In this group, the high-fracturing density confirms the recharge efficiency, and the physical-chemical properties of the hydraulic environment (electric conductivity) plays the main role of radon unavailability in the water intended for human consumption. Besides, the hydraulic turnover time of the springs can be considered an excellent radiological indicator in groundwater. In the absence of an anomalous radioactive source near the surface, it means that the high-turnover time of the springs leads to a low-radon concentration in the water. Besides linking high-risk areas with a short period required to free local flow discharges, this study exposes the virtues of a new perspective of a groundwater contamination risk modeling.

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Section: Introductionmentioning

confidence: 99%

An Assessment of Groundwater Contamination Risk with Radon Based on Clustering and Structural Models

Martins

Pereira

Oliveira

et al. 2019

Water

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“…The Corgo River is a tributary of the Douro River and runs mostly along the main regional geotectonic structure so-called the Penacova-Régua-Verín fault (PRVF) with a NNE-SSW direction, producing tectonic hillslopes ranging from 300 to 1400 m ( Figure 1c). This study area is characterized by a cold-wet period from October to May, succeeded by a warm-dry period from July to August [35]. This study area also has from 1960 to 1991 an annual precipitation rate between 721 to 2709 mm ( Figure 1d).…”

Section: Study Areamentioning

confidence: 99%

A New Framework for the Management and Radiological Protection of Groundwater Resources: The Implementation of a Portuguese Action Plan for Radon in Drinking Water and Impacts on Human Health

Martins

Pereira

Oliveira

et al. 2019

Water

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In general, this study was developed to assess the radon contamination in groundwater intended for human consumption, to raise awareness among policy-makers to implement a legal framework for drinking water management and the radiological protection of groundwater resources. Thus, we analyzed with parallel coordinate visualization (PCV) plots what features may influence the water–rock interaction and promote high-radon concentrations in water intended for human consumption. The results show that in granitic areas composed by biotite granites (Group V), although there is a higher radon production in the rocks, the radon transfer to groundwater was not effective, mainly due to the physical and chemical properties of the water. The main conclusions show that in all springs sampled (n = 69) for the entire study area, there are only four springs that must have an immediate intervention, and 22 of them are above the limit imposed by the Portuguese legislation. These results are intended to promote a Portuguese Action Plan for Radon that can be framed in the guidelines on the management and protection of groundwater resources.

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“…Sebagian air yg mengalami infiltrasi kembali ke udara sebagai evapotranspirasi (ETm), sementara bagian lainnya keluar sebagai aliran dasar (baseflow) (Qg). Aliran sungai yang juga dikenal sebagai runoff (Qr) merupakan jumlah dari air permukaan dan bawah tanah yang mengalami evaporasi langsung (Er) dan dikurangi dengan perubahan yang terjadi pada simpanan air permukaan (∆s) (Alencoaco & Pacheco, 2006).…”

Section: A Waktu Dan Lokasiunclassified

PENDUGAAN INFILTRASI MENGGUNAKAN DATA NERACA AIR DI SUB DAERAH ALIRAN SUNGAI WATUJALI, GOMBONG (Estimation of infiltration based on water balance method at Watujali Sub Watershed, Gombong)

Pramono¹,

Adi

2017

JPPDAS

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Infiltration rate in a watershed is very important for water management. There are many methods for estimating the rate of infiltration in a watershed. Among of them are direct measurements, hydrograph analysis and water balance calculation. The purpose of this study was to estimate infiltration in the sub watershed under pine forest. The method was based on a relationship between water balance and regression of monthly rainfall and discharge. The results showed that the infiltration rate of pine forest in Watujali Sub Watershed range from 125 mm/year up to 1,193 mm/year. The infiltration rate was highly depended on rainfall as the input. In 2010 with 5,826 mm rainfall, the infiltration rate reached 1,193 mm/year. Estimation of infiltration using water balance data was easy to implement because it only used data of streamflow, rainfall and evapotranspiration. ABSTRAKTingkat infiltrasi sangat penting untuk mengetahui tata air dalam suatu DAS (Daerah Aliran Sungai). Ada banyak metode untuk mengestimasi tingkat infiltrasi dalam suatu DAS, diantaranya adalah dengan pengukuran langsung, perhitungan dengan unit hidrograf, dan perhitungan dengan neraca air. Tujuan dari penelitian ini adalah mengestimasi tingkat infiltrasi di sub DAS yang tertutup hutan pinus. Metode yang digunakan berdasarkan hubungan antara neraca air dan regresi antara hujan dan aliran bulanan. Hasil penelitian menunjukkan bahwa tingkat infiltrasi dari hutan pinus di Watujali berkisar antara 125 mm/tahun sampai dengan 1.193 mm/tahun. Tingkat infiltrasi sangat tergantung pada curah hujan sebagai input. Pada tahun 2010 dengan curah hujan 5.826 mm, tingkat infiltrasi mencapai 1.193 mm/tahun. Pendugaan infiltrasi dengan menggunakan data neraca air mudah diterapkan karena hanya menggunakan data aliran sungai, hujan, dan evapotranspirasi. Kata kunci: infiltrasi; neraca air; regresi hujan dan aliran; hutan pinus

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Infiltration in the Corgo River basin (northern Portugal): coupling water balances with rainfall—runoff regressions on a monthly basis

Cited by 11 publications

References 19 publications

An Assessment of Groundwater Contamination Risk with Radon Based on Clustering and Structural Models

An Assessment of Groundwater Contamination Risk with Radon Based on Clustering and Structural Models

A New Framework for the Management and Radiological Protection of Groundwater Resources: The Implementation of a Portuguese Action Plan for Radon in Drinking Water and Impacts on Human Health

PENDUGAAN INFILTRASI MENGGUNAKAN DATA NERACA AIR DI SUB DAERAH ALIRAN SUNGAI WATUJALI, GOMBONG (Estimation of infiltration based on water balance method at Watujali Sub Watershed, Gombong)

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