No 48 - Journal of Water and Land Development

A computer model EUSS (Emission Uniformity on Sloping Surfaces) has been developed to design and evaluate the  system capacity under operating conditions for drip irrigation system. And achieve the desired value of emission uniformity  that is not significantly different according to the recommended values by applying it in field experiment located at Al-Slahia city, Egypt. The model has the ability to design the system by all of the common design techniques and have ability  to customize any of them. EUSS model includes two main parts: crop water requirements, and hydraulic calculations of the system using metric  unit system. It developed in graphical user interface of the programming language C-sharp (C#) by using Microsoft Visual  Studio. The model database is containing the equations, tables and reference values to get more rapid and accurate results,  and gives the opportunity for selecting some parameters such as: soil properties, characteristics of the corresponding crop,  and climatic data. EUSS model allows the user to assume or set definite values, for example plot layout, land slopes and  topography, the emitter characteristics and operating conditions.

Arsenic is one of the most harmful pollutants in groundwater. In this paper, the Nepali bio sand filter (BSF) was modified with different bio-adsorbents, and proved to be an efficient method for arsenic removal from groundwater. Three different bio-adsorbents were used to modify the Nepali BSF. Iron nails and biochar BSF, ~96% and ~93% arsenic removal was achieved, within the range of WHO guidelines. In iron nails, BSF and biochar BSF ~15 dm3 ∙h–1 arsenic content water was treated. In the other two BSFs, rice-husk and banana peel were used, the arsenic removal efficiency was ~83% of both BSFs. Furthermore, the efficiency of rice-husk and banana peel BSFs can be increased by increasing the surface area of the adsorbent or by reducing the flow rate.

The main purpose of river system is to renovate its old processes. This article represents the results of two numerical  models and a field site screening results for the river renovation in Idaho, U.S.A and some restoration methodologies that  have been used to better understand possible renovating strategy. Ecological recovery methods using a degraded stream  ecosystem have been found after estimating a channel design's capability. Despite these representing methods it is hard to  present the most effective method to get efficient renovative outcomes. Two hydrodynamics modelling (MIKE 11-GIS and  HEC-RAS5) and field site screening are used to evaluate pre- and post-renovation modifies in 35 laboratory experiments  and biological performance indicators. Movement formed between 1994 and 2014 have been considered in this research.  Ecosystem improvements have been evaluated to compare the pre-post renovation situations by considering the parameters  such as water surface elevation, lower slope, shear stress, depth, wet perimeter, and velocities. The numerical model results  for all mentioned parameters show that after the completion of phase I, II, III and IV, the sinuosity of the channel will be  very close to the 1986 condition. The sediment carrying capacity and potential use of MIKE 11-GIS, hydrodynamic model  for scour has been reduced throughout the lower reaches of the project site, where the channel slope is at its steepest position, and a close match with the field site screening and have been shown and presented as graphs.

The study shows the biodiversity of Utricularia australis from western to northern regions of Ukraine. The environmental conditions of Ukraine are favourable for the spread and formation of phytocenosis involving U. australis, especially on thermoclimatic, cryothermal and continental scale. A broader range of the species’ relation to humidity has been recorded. The research outcome shows the existence of the species in conditions from shallow, parched reservoirs to deep water  habitats which allows the species to withstand temporary drying of reservoirs in summer periods. The resilience of U. australis to some water quality parameters, including nitrogen, phosphorus, iron content, colour, pH and organic contamination  was higher than in previous studies and Tsyganov’s ecological scales. Thus, due to its wide range of tolerance to the majority of environmental factors, U. australis tends to spread in contemporary climatic conditions in Ukraine. Considering that  the species has category “vulnerable” in the country and is listed in the red data book of Ukraine, its conservation status is  likely to be revised further.

The article focuses on the actual scientific and practical problem of accounting for the influence of meteorological and  climatic factors in the technical and economic calculations in the field of environmental management. It has been proven that the introduction of scientifically sound and effective methods of using meteorological and climatic information in economic calculations significantly reduces the loss caused by weather conditions and improves the  implementation of an optimal strategy for agricultural production on reclaimed lands. Such calculations are based on economic and statistical modelling of different variants that accounting for standard hydrometeorological information in the implementation of design, management and economic decisions. This increases the  validity and reliability of calculations, as well as their compliance with the actual operating conditions of environmental  and economic facilities. Consequently, this attracts increased interest of both public and private investors. Not only under such conditions is a sustainable development of environmental management sectors possible but also  the adaptation to global climate change and additional benefits from the efficient economic activity in the new environmental conditions.

Under conditions of gravity flow, the performance of a distribution pipe network for drinking water supply can be  measured by investment cost and the difference in real and target pressures at each node to ensure fairness of the service.  Therefore, the objective function for the optimization in the design of a complex gravity flow pipe network is a multipurpose equation system set up to minimize the above-mentioned two parameters. This article presents a new model as an  alternative solution to solving the optimization equation system by combining the Newton–Raphson and genetic algorithm  (GA) methods into a single unit so that the resulting model can work effectively. The Newton–Raphson method is used to  solve the hydraulic equation system in pipelines and the GA is used to find the optimal pipe diameter combination in a network. Among application models in a complex pipe network consisting of 12 elements and 10 nodes, this model is able to  show satisfactory performance. Considering variations in the value of the weighting factor in the objective function, optimal conditions can be achieved at the investment cost factor (ω1) = 0.75 and the relative energy equalization factor at the  service node (ω2) = 0.25. With relevant GA input parameters, optimal conditions are achieved at the best fitness value of  1.016 which is equivalent to the investment cost of USD 56.67 thous. with an average relative energy deviation of 1.925 m.

In recent times there have been many changes on Earth, which have appeared after anthropogenic impact. Finding solutions to problems in the environment requires studying the problems quickly, make proper conclusions and creating safe and useful measures. Humanity has always had an effect on the environment. There can be many changes on the Earth because of direct and indirect effects of humans on nature. Determining these changes at the right time and organizing measurements of them requires the creation of quick analysing methods. This development has improved specialists’ interest for remote sensing (RS) imagery. Moreover, in accordance with analysis of literature sources, agriculture, irrigation and ecology have the most demand for RS imagery. This article is about using geographic information system (GIS) and RS technologies in cadastre and urban construction branches. This article covers a newly created automated method for the calculation of artificial surface area based on satellite images. Accuracy of the analysis is verified according to the field experiments. Accuracy of analysis is 95%. According to the analysis from 1972 to 2019 artificial area enlargement is 13.44%. This method is very simple and easy to use. Using this data, the analysis method can decrease economical costs for field measures. Using this method and these tools in branches also allows for greater efficiency in time and resources

As part of the study, world fuel and energy were analysed. A model for the development of state tax audit in the  framework of innovative economic development is proposed. As a methodological base, general scientific research  methods were used, first of all, systems and integrated analysis methods to substantiate the essence of the state tax audit, to  develop approaches to the analysis of its results, and also to determine development trends. The importance of modernizing  the system based on the identified relationship between the level of innovative development and the volume of tax revenues  is substantiated. The developed model is based on the assumption that the tax gap will be minimized by encouraging taxpayers to voluntarily fulfil their tax obligations. The necessity of creating a supranational body of state audit within the  framework of integration processes is substantiated. The prospects for the development of Supreme Audit Institutions  (SAIs) in the context of globalization have been outlined, including the creation of territorial standards for a state audit of  the Eurasian Economic Union (EAEU) countries.

The article is devoted to the actual scientific and practical problem of improving methodological and methodical approaches to the evaluation of design solutions in the water management and land reclamation industry based on the ecological and economic principles in conditions of uncertainty. The current stage of the development of the water management sector in Ukraine is characterized by a combination of  past negligence and the present energy, food and water crises, as well as global climate change. To solve these problems, it  is necessary to reform organizational-economic relations in the industry, including new sources and forms of financing for  water management and land reclamation projects, introduction of new environmentally advanced technologies, and the improvement of the existing ecological and economic evaluation of investments. Based on scientific and methodological recommendations used for evaluating the effectiveness of investment in various spheres of economic activity, the authors developed and implemented an improved methodology for the evaluation of  water management and land reclamation projects. It is based on methodological approaches that cover such elements as the  variety of options, changes in the value of money over time, specific project implementation environment, including the  impact of weather, climate and environmental factors on project performance, multilevel and gradual evaluation of a project against specific criteria and according to stages of the project cycle. The method was tested during the reconstruction of a rice irrigation system in the steppe zone of about 3000 ha in  Ukraine. Economic results, namely the deterministic payback period and investment return index confirm that the proposed  mechanism, unlike the traditional one, increases the economic and environmental feasibility of water management and land  reclamation projects. Therefore, it stimulates investment in the land reclamation sector.

The Bay of Cartagena (Colombia) is a site of commercial interest owing to its privileged location for maritime operations; however, the discharge of wastewaters from industrial activities and domestic sewage are affecting the water quality, and consequently, the biodiversity of coastal ecosystems. The polycyclic aromatic hydrocarbons (PAHs) are found in sediments and water of main ports, causing severe damage to the ecosystem. Thus, alternatives for the treatment of the Bay of Cartagena’s water and sediments are needed. In this paper, we performed the exergetic analysis of removing PAHs from water and sediments in the Bay of Cartagena using an adsorption-based treatment process with chitosan microbeads and magnetic nanoparticles (CM-TiO2/Fe3O4). The outcomes of exergy of utilities, irreversibilities and exergy losses were calculated using process data and exergy of substances. The Aspen plus V10 software provided the physical exergies, while chemical exergies were gathered from the literature. Overall exergy efficiency of 0.3% was determined for the seawater and sediment treatment facility. A sensitivity analysis was performed to identify the impact and viability of different design alternatives.

Water quality is an environmental priority for irrigation in rainfed agriculture. Recently, water quality has been affected by the uncontrolled disposal of wastewater, the use of chemical fertilizers in agriculture and, most significantly, by the excessive exploitation of water resources during the low season. The basin of the Maffragh in the Algerian north-east real is fed by two main rivers: Wadi El Kebir East and Bounnamoussa. From its source, the stream is continually contaminated with domestic and agricultural discharges through the tributaries causing a significant deterioration in water quality. In order to know the current state of water quality in the Maffragh basin and to determine its suitability for irrigation without any prior treatment, research has been conducted in the two streams at representative sampling points in catchment areas used for irrigating crops. To assess the quality of water and detectable compounds monitoring, laboratory methods are used. The various volumetric and colorimetric assays were carried out according to Jean Rodier. Organic parameters such as nitrites, ammonium and phosphates, were measured using a UV/VIS 6705 JENWAY spectrophotometer, at wavelengths of 543 nm, 630 nm and 880 nm respectively for nitrites, ammonium and phosphates. The BOD5 and COD parameter was measured using a DIN EN 1899-1-H51 spectrophotometer and DIN ISO15705: 2002 spectrophotometer. The performed analyses on conductivity shows oscillating values ranging between 425 and 495 µS∙cm–1 for January 2018, while for the low water level of July 2018 the conductivity varies between 433 and 796 µS∙cm–1 ; this parameter is determinant for water quality assessment and its use for irrigation. Beside the conductivity test, the Riverside–Wilcox diagram was applied, to combine conductivity and sodium absorption rate (SAR). The obtained results of the two seasons show satisfactory results in the applicability of the water to irrigate in the basin.

The process of sorption of chromium(III) ions with a stationary sorbent layer of bentonite clays was investigated. The main advantages of using bentonites in water purification technologies are described: powerful geological reserves, cheap process of rock extraction, easy preparation for transportation and use, possibility of using waste sorbents in other technologies that is why there is no need in costly regeneration. The influence of various factors (process duration, an adsorbent layer) on the degree of wastewater purification from chromium ions, the effect of pumping speed on the dynamic capacity of the sorbent was studied and the effective volume was determined. The adsorption efficacy increases with the increase of the adsorbent layer, what can be explained by the development of the active sorption surface. As the initial concentration of chromium ions increases, the time of appearance of the first traces of the contaminant at the exit of the column increases, as well as the total time to channeling. The results of the studies indicate a higher adsorption capacity of modified bentonite with respect to Cr3+ ions compared to its natural formula. The cleaning efficacy of the solution with a concentration of chromium ions of 0.5 g∙dm–3 is increased by 5% when using 15 g of modified bentonite and 6,5% in the case one uses 20 g compared to the natural form.

Nigeria has abundant surface and ground water resources many of which are polluted and can be detrimental to human health when consumed. This study investigated the effects of effluents discharged by industries into streams on the health of people who depend on stream water for domestic purposes in the Onitsha urban area of eastern Nigeria. Water samples collected from eleven discharge locations underwent physico-chemical and microbiological analyses. Data on the effects of industrial effluents on health were obtained from records in the public hospitals located in Onitsha as well as through questionnaire surveys and field observations. The results of the analyses revealed that the effluents grossly degrade surface water bodies; several parameters (temperature, iron, dissolved oxygen, turbidity, biological oxygen demand, chemical oxygen demand, lead, magnesium, total heterotrophic counts, total coliform group, pH) had values which were higher than the WHO (2011) safety limits for drinking water. The contamination of investigated streams by effluents had negative impact on the health of stream users. The discussion included health effects of polluted water and the prevalence of water borne or related diseases in the area. Implications of these findings were also discussed. Management measures capable of minimizing contamination of surface water in the study area were suggested.