High-resolution monitoring of nutrients in groundwater and surface waters: process understanding, quantification of loads and concentrations, and management applications

Abstract. Four sessions on "Monitoring Strategies: temporal trends in groundwater and surface water quality and quantity" at the EGU conferences in 2012, 2013, 2014, and 2015 and a special issue of HESS form the background for this overview of the current state of high-resolution monitoring of nutrients. The overview includes a summary of technologies applied in high-frequency monitoring of nutrients in the special issue. Moreover, we present a new assessment of the objectives behind high-frequency monitoring as classified into three main groups: (i) improved understanding of the underlying hydrological, chemical, and biological processes (PU); (ii) quantification of true nutrient concentrations and loads (Q); and (iii) operational management, including evaluation of the effects of mitigation measures (M). The contributions in the special issue focus on the implementation of high-frequency monitoring within the broader context of policy making and management of water in Europe for support of EU directives such as the Water Framework Directive, the Groundwater Directive, and the Nitrates Directive. The overview presented enabled us to highlight the typical objectives encountered in the application of high-frequency monitoring and to reflect on future developments and research needs in this growing field of expertise.

Download Full-text

High resolution monitoring of nutrients in groundwater and surface waters: process understanding, quantification of loads and concentrations and management applications

10.5194/hess-2016-169 ◽

2016 ◽

Cited By ~ 1

Author(s):

F. C. van Geer ◽

B. Kronvang ◽

H. P. Broers

Keyword(s):

High Resolution ◽

High Frequency ◽

Spatial Scales ◽

Temporal Trends ◽

Surface Water Quality ◽

Mitigation Measures ◽

Nutrient Concentrations ◽

Special Issue ◽

Frequency Monitoring ◽

Eu Directives

Abstract. Four sessions on "Monitoring Strategies: temporal trends in groundwater and surface water quality and quantity" at the EGU-conferences in 2012, 2013, 2014 and 2015 and a special issue of HESS form the background for this overview of the current state of high resolution monitoring of nutrients. The overview includes a summary of technologies applied in high frequency monitoring of nutrients in the special issue. Moreover, we present a new assessment of the objectives behind high frequency monitoring as classified into three main groups: (i) improved understanding of the underlying hydrological, chemical and biological processes (PU); (ii) quantification of true nutrient concentrations and loads (Q); (iii) operational management, including evaluation of the effects of mitigation measures (M). The contributions in the special issue focus on the implementation of high frequency monitoring within the broader context of policy making and management in Europe for support of EU Directives such as the Water Framework Directive, the Groundwater Directive and the Nitrate Directive. The overview presented based on the special issue and the presentations at the four EGU sessions enabled us to highlight the typical objectives encountered in the application of high frequency monitoring to support EU Directives, to assess the temporal and spatial scales and to reflect on future developments and research needs in this growing field of expertise.

Download Full-text

High-frequency monitoring of surface water quality at the outlet of the Ibrahim River (Lebanon): A multivariate assessment

Ecological Indicators ◽

10.1016/j.ecolind.2019.04.061 ◽

2019 ◽

Vol 104 ◽

pp. 13-23 ◽

Cited By ~ 14

Author(s):

Paula El Najjar ◽

Amine Kassouf ◽

Anne Probst ◽

Jean-Luc Probst ◽

Naim Ouaini ◽

...

Keyword(s):

Water Quality ◽

Surface Water ◽

High Frequency ◽

Surface Water Quality ◽

Frequency Monitoring

Download Full-text

Tracking the turbidity maximum zone in the Loire Estuary (France) based on a long-term, high-resolution and high-frequency monitoring network

Continental Shelf Research ◽

10.1016/j.csr.2016.01.017 ◽

2016 ◽

Vol 117 ◽

pp. 1-11 ◽

Cited By ~ 23

Author(s):

Isabel Jalón-Rojas ◽

Sabine Schmidt ◽

Aldo Sottolichio ◽

Christine Bertier

Keyword(s):

High Resolution ◽

High Frequency ◽

Monitoring Network ◽

Turbidity Maximum ◽

Turbidity Maximum Zone ◽

Frequency Monitoring

Download Full-text

High-frequency monitoring of stream water physicochemistry on sub-Antarctic Marion Island

Water SA ◽

10.4314/wsa.v44i2.13 ◽

2018 ◽

Vol 44 (2 April) ◽

Author(s):

M-J Stowe ◽

DW Hedding ◽

FD Eckardt ◽

W Nel

Keyword(s):

Electrical Conductivity ◽

High Resolution ◽

Water Temperature ◽

Total Variation ◽

High Frequency ◽

Stream Water ◽

Precipitation Event ◽

Induced Response ◽

Marion Island ◽

Frequency Monitoring

Given the remoteness and challenging environmental conditions on sub-Antarctic Marion Island, continuous high-resolution studies of the island’s natural water systems are rare. Subsequently, current understanding of the island’s hydrochemistry is based entirely on manual point-based measurements. To address this research gap we analysed continuous, in-situ high-frequency physicochemical measurements (pH, water temperature, dissolved oxygen (DO), and electrical conductivity (EC)) from the Soft Plume River over the period 21 April 2015–26 April 2015. We observed a sharp, short-term response from all measurements to a precipitation event that was superimposed on consistent but subtle diel (i.e. 24 h) cycles throughout the study. Total variation in pH and electrical conductivity amounted to 1.3 units and 27.7 μS/cm respectively. Stream water temperature was less variable (6.2°C) than air surface temperature (14.2°C). Total variation in DO was 2.0 mg/L. Aside from the precipitation-induced response, diel oscillations were small and only visible through the use of continuous, high-resolution monitoring. Findings highlight the advantages of continuous high-frequency monitoring in capturing the range of daily variation and elucidating diel cycles in stream water physicochemistry on sub-Antarctic Marion Island that have not previously been accounted for.

Download Full-text

Measuring Exposome Associated with Health

Global Clinical and Translational Research ◽

10.36316/gcatr.02.0030 ◽

2020 ◽

pp. 46-50

Keyword(s):

Mass Spectrometry ◽

Remote Sensing ◽

High Resolution ◽

Biological Effect ◽

High Resolution Mass Spectrometry ◽

The Body ◽

Ecological Environment ◽

Special Issue ◽

The Life Course ◽

Resolution Mass

The concept of exposome has received increasing discussion, including the recent Special Issue of Science –"Chemistry for Tomorrow's Earth,” about the feasibility of using high-resolution mass spectrometry to measure exposome in the body, and tracking the chemicals in the environment and assess their biological effect. We discuss the challenges of measuring and interpreting the exposome and suggest the survey on the life course history, built and ecological environment to characterize the sample of study, and in combination with remote sensing. They should be part of exposomics and provide insights into the study of exposome and health.

Download Full-text

DETAILED CHARACTERIZATIONS OF THE CRETACEOUS TUNUNK SHALE, NORTH HENRY BASIN, UTAH, USA: A HIGH-RESOLUTION STUDY OF MUDSTONE PARASEQUENCES INTEGRATING SEDIMENTOLOGY AND PETROGRAPHY WITH HIGH-FREQUENCY PXRF

10.1130/abs/2018am-321770 ◽

2018 ◽

Author(s):

Britt Rossman ◽

Keyword(s):

High Resolution ◽

High Frequency ◽

Resolution Study

Download Full-text

PCDRN: Progressive Cascade Deep Residual Network for Pansharpening

Remote Sensing ◽

10.3390/rs12040676 ◽

2020 ◽

Vol 12 (4) ◽

pp. 676 ◽

Cited By ~ 1

Author(s):

Yong Yang ◽

Wei Tu ◽

Shuying Huang ◽

Hangyuan Lu

Keyword(s):

High Resolution ◽

Loss Function ◽

High Frequency ◽

Experimental Results ◽

Superior Performance ◽

Residual Network ◽

High Quality ◽

Convolution Approach ◽

Visual Assessments ◽

Coarse To Fine

Pansharpening is the process of fusing a low-resolution multispectral (LRMS) image with a high-resolution panchromatic (PAN) image. In the process of pansharpening, the LRMS image is often directly upsampled by a scale of 4, which may result in the loss of high-frequency details in the fused high-resolution multispectral (HRMS) image. To solve this problem, we put forward a novel progressive cascade deep residual network (PCDRN) with two residual subnetworks for pansharpening. The network adjusts the size of an MS image to the size of a PAN image twice and gradually fuses the LRMS image with the PAN image in a coarse-to-fine manner. To prevent an overly-smooth phenomenon and achieve high-quality fusion results, a multitask loss function is defined to train our network. Furthermore, to eliminate checkerboard artifacts in the fusion results, we employ a resize-convolution approach instead of transposed convolution for upsampling LRMS images. Experimental results on the Pléiades and WorldView-3 datasets prove that PCDRN exhibits superior performance compared to other popular pansharpening methods in terms of quantitative and visual assessments.

Download Full-text