Journal of Environmental & Earth Sciences

Features of the Geoinformation Monitoring System Using Microwave and Optical Tools

Ferdenant A. Mkrtchyan — Wed, 15 May 2024 00:00:00 +0800

The article discusses the issues of GIMS-technology that combines the methodology of GIS-technology and simulation modeling, giving it predictive functions when solving problems of environmental monitoring of the environment. The relationships between experimental data, algorithms and models of environmental processes are analyzed to implement effective operational control and diagnostics of the environment. Particular attention is paid to remote microwave sensing sensors, which ensure the implementation of the functions of GIMS-technology when solving specific problems of monitoring natural systems. For example, the use of microwave technology makes it possible to quickly obtain data on the state of soil moisture, and salinity water bodies, assess the possibility of critical hydrological situations and monitor the condition of hydraulic structures in regions with increased hydrological hazard. It is noted that GIMS-technology ensures the restoration of the spatial distribution of geoecosystem characteristics based on the data of route and ground measurements, which are characterized by fragmentation in space and episodicity in time. GIMS-technology makes it possible to overcome situations of irreducible information uncertainty, using the evolutionary modeling technique for this. The use of optical sensors and spectroellipsometry and spectrophotometry technologies makes it possible to calculate indicators of the quality of water resources, assessing the content of chemical elements in water and the presence of pollutant stains on the water surface.

Water Quality Assessment Using the Water Quality Index, and Geographic Information Systems in Nador Canal, Morocco

Sat, 11 May 2024 00:00:00 +0800

In recent decades, water pollution has emerged as a significant concern, posing a threat to both humans and natural ecosystems. This study aimed to assess the spatial variations in water quality in the Nador Canal, Morocco using the water quality index combined with multivariate statistical techniques and geographic information systems (GIS). The parameters examined were then compared to the maximum permissible limit values recommended by Moroccan surface water standards and the World Health Organization. The results indicated that the WQI of Nador Canal is generally suitable for irrigation and unsuitable for drinking. It indicated that the quality of surface water in the Nador Canal is affected by organic pollutants, and this is evidenced by low levels of dissolved oxygen, the levels of elements were high, especially chlorine and sodium, in addition to a high concentration of ammonia, nitrate, and phosphate in some of the stations studied. Principal component analysis (PCA) results revealed that PC1–PC3 collectively accounted for 73% of the variation in surface water quality within the study area. The cluster analysis also proves that the water quality is relatively polluted. Potential contributing factors to surface water pollution include changes in the hydrological regime, household waste discharges, and agricultural activities. These findings furnish essential insights into water quality, particularly its suitability for irrigation, and contribute to enhancing the water quality management system of the Nador Canal in the Gharb region of Morocco.

Scintillation Level of Scattered Radio Waves in the Equatorial Ionosphere

George Jandieri, Zaza Sanikidze, Nino Mchedlishvili — Tue, 25 Jun 2024 00:00:00 +0800

Scintillation effects of propagating and scattered radio waves (RWs) are considered analytically and numerically in the equatorial terrestrial ionosphere applying the statistical characteristics. Analytical calculations of the second-order statistical moments of the phase fluctuations of the ordinary and extraordinary RWs in the conductive collision ionospheric magnetoplasma (COCOIMA) are carried out for the first time using the Wentzel-Kramers-Brilluen method and the modified smooth perturbation method in consideration of the diffraction effects. Polarization coefficients of these waves in the equatorial ionosphere have been derived for the first time. The scintillation level includes the variance and the correlation functions of scattered RWs. Statistical moments contain complex refractive index, anisotropy coefficient characterizing irregular plasmonic structures, tilt angle of prolate irregularities concerning to the external magnetic field, permittivity components of the equatorial ionosphere, Hall's, Pedersen and longitudinal conductivities. A new feature of the "Fountain Effect" has been discovered in the equatorial ionosphere at weak and moderate scintillations caused due to anisotropy parameters of electron density fluctuations. Anisotropy parameters of electron density inhomogeneities influence the scintillation index of both the ordinary and extraordinary radio waves shifting maximums of the curves in the opposite directions at weak and moderate scintillations. Numerical calculations are carried out using the hybrid anisotropic correlation function of electron density fluctuations containing both exponential and power-law spectral functions having arbitrary spectral index, applying the experimental data.

Contingent Valuation on Residents' Willingness to Pay for Mangrove Rehabilitation in Baroy, Lanao Del Norte, Philippines

Arif M. Ampaso, Mark Joseph J. Buncag, Ricmar P. Magarin, Kaleb P. Arreza — Wed, 12 Jun 2024 00:00:00 +0800

There were about 450,000 hectares of mangroves in the Philippines in the early 1900s which declined to 311,400 hectares in 2020 due to continued pressures from human-caused degradations such as illegal logging and conversion to fish and shrimp ponds in which rehabilitation is needed. This study, therefore, determined the factors that influence the resident's Willingness to Pay for mangrove rehabilitation in Barangay Raw-an Point, Baroy, Lanao del Norte, Philippines. Using the single-bounded dichotomous choice contingent valuation method, the willingness to pay of the local community for mangrove rehabilitation was assessed. A total of 200 households were involved in the survey. Focus Group Discussion was utilized in obtaining the bid amounts used in the survey questionnaire. The results show that 84% of the 200 households expressed willingness to pay for the mangrove rehabilitation project. Furthermore, the mean willingness to pay was computed at PHP 139.00 (2.40 USD) per household per month, equivalent to Php 665,524.00 (11,502 USD) per year for the total number of households in Barangay. The findings of the logistic regression analysis revealed that the bid amount, knowledge, and perception on both the economic importance and the ecological services provided by mangroves affect the willingness to pay on the respondents.

Laboratory and Mathematical Modeling of Green Roof and Different Color Roofs

Joseph Cataldo, Yara Yasser Elborolosy — Thu, 06 Jun 2024 00:00:00 +0800

Several studies were compiled using data from physical models of green and black surfaces in the lab and the Cooper Union (CU) roof as well as green roof studies of the Javits Green Roof (JGR) measured over a six-year period. Observations were made with weather stations, custom designed draining systems and three partial flumes each equipped with a pressure transducer and weighing lysimeters. An infrared camera was used at the CU and JGR to collect thermal images to determine the effectiveness these roofs had for thermal buffering. A multiple regression curve was calculated relating the lysimeter mass and five independent variables, with the precipitation runoff and retention time being the most important variables. The surface of the black roof was compared to white and green roofs at CU. The temperature was significantly higher (over 70 °C) on the black roof clearly showing the advantage of using a green roof. The ET was calculated on the JGR using the Penman-Monteith (P/M) equations. The runoff hydrograph for the JGR was constant with an increase in precipitation and storage when the hydrograph dropped in response to the precipitation and storage. When the plots (185 square meters at JGR) were irrigated, the dry plots always had higher temperatures (above 15 °C during summer daytime). The ET is the controlling factor for temperature reduction on a vegetated green roof as shown in the JGR data. The relative humidity (RH) was measured in the CU lab and on the JGR and showed similar results. The RH dropped during higher temperatures and recovered at lower temperatures. The results of these studies at CU and JGR clearly show the benefits of using a vegetated green roof.

An Innovative Predictive Model for Indoor Thermal Comfort Condition of Residential Buildings to Mitigate Urban Warming: Case Study Kolkata, India

Sanmarga Mitra, Shailendra Kr. Mandal — Mon, 17 Jun 2024 00:00:00 +0800

The thermal comfort of building interior is one of the most important components of its thermal performance. The reliance of a building on artificial conditioning depends primarily on its inner comfort conditions. In recent times, this higher reliance of buildings on artificial ventilation and air conditioning has led to firstly, the creation of the heat island effect within cities, and secondly, the continuous warming of urban centers (particularly metropolises) with respect to the region and the hinterland to which they belong. The aim of this research is to investigate the relationship between the indoor thermal condition of old and new buildings to the contributing factors and to develop an innovative predictive numerical model to design buildings ensuring better indoor thermal comfort conditions. To date, no such composite predictive model has been innovated, although a considerable amount of work has been done on the factors separately. Considering the global urban warming since 1970 this research has sampled an equal number of residences from "Old Buildings" built before 1947 CE and "New Buildings" built after 1970 CE. This study is based on a composite analysis of the thermal performances of sample buildings against the physical factors influencing thermal performance—initially through examination of correlation and thereafter by developing a set of innovative numerical predictive models between indoor thermal conditions and their contributing parameters. This new numerical model shows a 55% curve-fitting on the thermal comfort index used.

Valorization of Agricultural Wastes to Offset Greenhouse Gases (GHGs) Emissions: An Insight in Southeast Asia

Zhylannie Nacua, Gina Lacang — Wed, 19 Jun 2024 00:00:00 +0800

This paper aims to review and synthesize the existing literature on agricultural waste valorization in the Southeast Asian (SEA) region, with a focus on its potential to offset greenhouse gas (GHG) emissions. The SEA region generates abundant agricultural wastes from major commodity crops, such as: rice, palm oil, sugarcane, coconut, and corn, which present opportunities for valorization. The review found that countries like Indonesia, Malaysia, and Thailand have conducted several studies on agricultural waste valorization, exploring pathways such as bioenergy, value-added products, and soil amendments. However, only a few studies exist for some countries with high residue valorization potential, such as Vietnam and the Philippines. The reviewed literature showed a relationship between agricultural waste valorization and emissions that could contribute to air pollution, but no direct association was established with the associated GHG emissions. The abundance of agricultural residues across SEA presents opportunities for valorization to offset GHG emissions. However, effective valorization is hindered by challenges like open burning practices, logistical issues, and a lack of sustainable waste management strategies. This review highlights the need for further research to establish the direct relationship between agricultural waste valorization and GHG emissions reduction in the SEA region.

A Literature Review of the Environmental and Health Risks of Copper Foil Manufacturing Plants in Relation to a New Facility Planned in Catalonia, Spain

José L. Domingo — Wed, 22 May 2024 00:00:00 +0800

Electrolytic copper foil (elecfoil) is a thin copper foil with a thickness of less than 10 µm, which is an essential component for the manufacture of electric batteries. More specifically, it is widely used to make cathode collectors in rechargeable lithium batteries. Over the next few years, the expected demand for electricity is very important. Therefore, there will be an evident need for new manufacturing plants of copper foil. In relation to this, as can happen with any industrial facility, elecfoil manufacturing plants may pose potential environmental and health risks. These risks may affect the surrounding ecosystems, as well as the population living in the vicinity of the facilities. Contamination of air (particulate matter, SO₂, NOx, VOCs), water (copper and other heavy metals), and soil (heavy metals and other harmful substances) is an issue of notable concern. In Mont-Roig del Camp (Catalonia, Spain), a new elecfoil facility is currently planned. Considering the social concern that this facility—the first one in Spain—has raised in the population of the area, the state-of-the-art electrolytic copper foil manufacturing plants are here reviewed. The scientific databases Scopus, PubMed and Google Scholar, as well as information obtained from different sources (Internet), were used. The most important conclusion of this review is that there is currently no information—available in scientific journals—on the characterization and evaluation of the environmental and health risks of this kind of facility. Anyhow, to minimize the potential negative environmental and health impacts of this planned elecfoil manufacturing plant, strict periodical controls, comprehensive environmental management systems, and relevant regulations are strongly recommended.