A Sensor Web for Real-Time Groundwater Data Monitoring in Morocco

This article presents research and development of an interoperable platform to facilitate, monitor and coordinate groundwater data sharing. This system was orchestrated by a number of services described by Open Geospatial Consortium (OGC) such as Sensor Observation Service (SOS) and other services for the use of mapping data, Web Feature Services (WFS), Web Map Service (WMS), and catalogue services (CSW). An important activity for our project was the establishment of a portal for geographic data and services. Geoportal developed for this project will promote and facilitate access to groundwater data and share theme more openly. Otherwise our system has been designed to provide a powerful tool that enhances the ability of regional staff to monitor near real-time groundwater data (i.e.?piezometric level) and as a result will help provide a more effective response to environmental upsets.

Suitability of Groundwater from the Kherzet Youcef Lead-Zinc Deposit (North-Eastern Algeria) for Irrigation and Drinking Water Supply

As part of the hydro geological study of the Kherzet Youcef deposit, a drilling battery was carried out. The objective of this achievement is the satisfaction of the water needs of the city of Ain Azel (drinking water supply, irrigation and industrial water supply) and even the transfer to other municipalities suffering by the lack of water and the resumption of mining activity at the deposit of Kherzet Youcef. This water table is located in carbonate formations of Paleo-Neogene age linked to lead-zinc mineralization. Knowledge of water quality and its suitability for human consumption is an obligation. These metals have adverse health effects. We used the results of Sonarem’s analyses from 1973 to 1979. In addition, we carried out two analyses, during two years 2015-2016, on five boreholes. The parameters analyzed are major elements, physical parameters and trace metal elements (Zn, Pb and Fe). The analyses were done by ICP-AES. In our work, it has been shown that waste water is suitable for use in agriculture. For this we used the electrical conductivity at 25°C and those of the sodium adsorption ratio (SAR). For drinking water supply, monitoring the change in trace metal element (Zn, Pb and Fe) for two years has allowed us to conclude that groundwater in the groundwater table east of the Kherzet Youcef fault is generally acceptable. They are eligible by the quality standard set by Algerian regulations. However, they exceed the world health organization (WHO) standards, especially for lead. We recommend a revision of drinking water quality standards set by Algerian regulations, rigorous monitoring of TME content variation and water treatment before distribution.

Remote sensing heritage in a petabyte-scale:satellite data and heritage Earth Engine©applications

This paper aims to demonstrate results and considerations regarding the use of remote sensing big data for archaeological and Cultural Heritage management large scale applications.For this purpose,the Earth Engine©developed by Google©was exploited.Earth Engine©provides a robust and expandable cloud platform where several freely distributed remote sensing big data,such as Landsat,can be accessed,analysed and visualized.Two different applications are presented here as follows:the first one is based on the evaluation of multi-temporal Landsat series datasets for the detection of buried Neolithic tells(‘magoules’)in the area of Thessaly,in Greece using linear orthogonal equations.The second case exploits European scale multi-temporal DMSP-OLS Nighttime Lights Time Series to visualize the impact of urban sprawl in the vicinity of UNESCO World Heritage sites and monuments.Both applications highlight the considerable opportunities that big data can offer to the fields of archaeology and Cultural Heritage,while the studies also demonstrate the great challenges that still are needed to be overcome in order to make the exploitation of big data process manageable and fruitful for future applications.

Determining the influence of the physicochemical parameters of urban soils on As availability using chemometric methods：A preliminary study

An initial exploration was conducted using mathematical and statistical methods to obtain relevant information about the determination of the physicochemical parameters capable of controlling As uptake by ryegrass grown on contaminated topsoils.Concentrations of As in the soils were from 10 to 47 mg/kg,mainly in the As（V） form（57%–73%）.Concentrations of As in water extracts were very low（61–700 μg/kg）.It was suggested that As（Ⅲ） was mainly in the uncharged species and As（V） in the charged species.Chemometric methods revealed that the values of the ratio As（Ⅲ）/As（V） depended on the assimilated-phosphorus,the pseudo-total and water-extractable Fe contents and the soil p H.Arsenic concentrations measured in ryegrass shoots ranged from 119 to 1602 μg/kg.Positive linear correlations were obtained between As in ryegrass shoots and water extractable-As.The transfer coefficient of As correlated well with the ratio assimilated-phosphorus/Fe-oxides.As（Ⅲ）uptake by the shoot of ryegrass was controlled by the organic matter and Fe-oxide contents.