Provision Of Water Research Articles

The case-base reasoning to support decision-making in humanitarian response

The object of the study is decision-making processes in humanitarian response. It is noted that certain experience of humanitarian response can be used in similar situations in the future. It is determined that humanitarian response processes have the following features: complexity and dynamism; decision-making takes place in conditions of uncertainty; emerging situations require a prompt response. There is a lack of an integrated approach to the creation of decision support systems in humanitarian response. Current research is related to decision-making in the framework of predicting and eliminating the consequences of natural disasters, man-made disasters and armed conflicts, and humanitarian issues are considered as related. Case-base reasoning was chosen as a representation of knowledge about humanitarian response processes. This method allows using previous decision-making experience without performing a detailed analysis of the subject area and adapting the accumulated knowledge to new situations. The functions and structure of an decision-making support system in humanitarian response are defined. The system uses the case-base reasoning module to represent knowledge, which simulates human reasoning and is based on the effective use of existing experience. The module implements a modified case-base reasoning. The parametric representation of a case is extended by the indicator of the use of precedents. The structured representation of the case solution in the form of a sequence of steps, each of which has its own characteristics, allows for the adaptation of several cases that are close to the current situation. The results of the study were experimentally verified by training the module on the initial data set. Fifty cases were generated for the experiment, describing decision-making in the provision of drinking and industrial water to the population. The training results show that when the cases database is filled with fifty cases, the classification quality is 89%. The results obtained allow us to conclude that it is expedient to structure knowledge about humanitarian response in the form of cases with the possibility of further adaptation to new situations and training.

Enhancing economic and performance effectiveness of a geo-solar system using multi aspect artificial neural network

Geo-solar systems, comprising ground-source heat pumps (GSHP) and solar thermal collectors, offer promising solutions for sustainable space heating and hot water provision in residential buildings. However, optimizing these systems for maximum energy efficiency and cost-effectiveness remains a challenge. In this context, this study presents a comprehensive approach to enhancing the performance and cost-effectiveness of geo-solar systems. The proposed methodology integrates artificial neural network (ANN) techniques and multi-aspect optimization to optimize system parameters. The detailed of building mathematical model incorporating energy and exergy equations, thermodynamic, and economic relations for all system components. The neural network model inputs to the include five neurons represents Geothermal temperature, Solar radiation levels, System pressure levels, Ambient temperature, and Operational time, and the model outputs represent Energy efficiency and Exergy destruction rate. Through the training of ANN using simulation data and the application of a multi-objective genetic algorithm, the system is optimized for energy efficiency, cost, and environmental impact simultaneously. The results of analysis show that the exergy efficiency of system is 22.02 % and turbine generates 1963 kW. Changes in P10, ranging from 2000 to 3400 kPa leads to the exergy destruction reduction from 8350 kW to 8000 kW, while the other parameters exhibit an increasing trend.

Integrating Wireless Remote Sensing and Sensors for Monitoring Pesticide Pollution in Surface and Groundwater.

Water constitutes an indispensable resource crucial for the sustenance of humanity, as it plays an integral role in various sectors such as agriculture, industrial processes, and domestic consumption. Even though water covers 71% of the global land surface, governments have been grappling with the challenge of ensuring the provision of safe water for domestic use. A contributing factor to this situation is the persistent contamination of available water sources rendering them unfit for human consumption. A common contaminant, pesticides are not frequently tested for despite their serious effects on biodiversity. Pesticide determination in water quality assessment is a challenging task because the procedures involved in the extraction and detection are complex. This reduces their popularity in many monitoring campaigns despite their harmful effects. If the existing methods of pesticide analysis are adapted by leveraging new technologies, then information concerning their presence in water ecosystems can be exposed. Furthermore, beyond the advantages conferred by the integration of wireless sensor networks (WSNs), the Internet of Things (IoT), Machine Learning (ML), and big data analytics, a notable outcome is the attainment of a heightened degree of granularity in the information of water ecosystems. This paper discusses methods of pesticide detection in water, emphasizing the possible use of electrochemical sensors, biosensors, and paper-based sensors in wireless sensing. It also explores the application of WSNs in water, the IoT, computing models, ML, and big data analytics, and their potential for integration as technologies useful for pesticide monitoring in water.

RESTRUCTURING THE AGRICULTURAL PRODUCTION IN THE TOTA LAKE BASIN (COLOMBIA): PROS AND CONS TO ACHIEVE THE CHANGE

<p><strong>Background. </strong>Moorlands are strategic ecosystems that provide regulation and provision of water, and that face serious effects due to agricultural activities. Productive reconversion (PR) is a mixed environmental, and economic strategy for managing change in agricultural systems towards sustainable agroecological models. <strong>Objective</strong>. To investigate the factors that favor and prevent the implementation<strong> </strong>of PR.<strong> Methodology</strong>. The paper analyzed 26 variables of the productive (14), socioeconomic (6) and environmental (6) dimensions of 172 producers of long onion and potato growers in the Tota lake basin, Tota-Bijagual-Mamapacha moorland, Colombia. <strong>Results</strong>. It was found that 44% of the variables are identified in favor and the remaining 56% against the PR, highlighting the advances in training, social organization, environmental awareness and disposition of the producers for the PR, but being forced to continue the activity due to the economic profitability.<strong> Implication</strong>. The economic profitability is against sustainability, it is related to the implementation of harmful practices such as the indiscriminate, inefficient, unplanned use of agro-inputs for fertilization and pest and disease management, with highly toxic pesticides, composting without maturity, which affect both human and ecosystem health<strong>. Conclusion.</strong> The main challenges are from the productive dimension, in which strategies are consolidated aimed at promoting: a) the adequate selection of quality seed, b) better soil management, c) the management of pests and diseases based on phytosanitary plans that integrate monitoring traps, preventive actions, and restrict the use of agro-inputs of chemical synthesis and d) promote the efficient use of water resources based on the strengthening of participatory agroclimatic monitoring networks.</p>

Navigating the water–energy nexus amidst the Lebanese economic crisis

ABSTRACT Lebanon's economic crisis has disrupted the country's energy and water sectors, highlighting their interdependence. The methodology involves surveying 150 municipalities across all Lebanese governorates, ensuring a comprehensive coverage of public and private water resources. Data on water and energy were collected before and during the crisis to explore this nexus during periods of economic turmoil. The findings reveal a decline in water provision during the crisis, with the average weekly water supply plummeting from 49 h in 2019 to 22 h in 2023. Concurrently, the use of water tankers has surged from 26 to 44%, indicating a concerning shift in water acquisition methods. Despite the crisis, conventional water sources remain predominant, while unconventional sources account for less than 1% of the total supply. In response to the energy shortage, renewable energy sources have gained traction in residential, commercial, and industrial sectors. The scarcity and rising cost of electricity have driven the adoption of solar photovoltaics in the water sector, reaching 4.8% for extraction from underground reservoirs and 2.8% for distribution. Similarly, the use of solar water heaters has increased from 7.9 to 15.4% in 2023. These findings underscore the interplay between energy and water security during periods of economic instability.

The effect of woody encroachment on taxonomic and functional diversity and soil properties in Cerrado wetlands

The encroachment of woody species has been affecting wetlands in the Cerrado biome, Brazil. This process has resulted in changes in plant diversity, soil physicochemical properties, and water availability. This study assessed changes in the taxonomic and functional diversity of plants and soil in Veredas wetlands in process of reduction in water availability and woody plant encroachment. Over a 14-year interval, we quantified taxonomic and plant functional diversity, soil physicochemical properties, groundwater depth, and its relationship with historical soil moisture using remote sensing in veredas. We investigated the effect of increased groundwater depth, woody vegetation cover, and changes in soil properties on species cover and richness. We observed a five to seven-fold increase in woody vegetation cover, accompanied by an increased in the richness of woody species from 21.4 % to 28.9 %. Nevertheless, this was counterbalanced by a 15.8 % to 35.2 % reduction in overall species richness and taxonomic diversity. At the same time, functional diversity decreased, leading to a community with more acquisitive traits. Groundwater depth increased from 20 to 60 cm. Soil properties changed, especially organic matter content, which increased two to 14 times. Changes in species richness and cover were related to increased organic matter and groundwater depth. The surveyed veredas exhibited considerable changes in plant species richness, soil, and hydrological properties, as well as woody vegetation cover, over 14 years. The veredas formed distinct functional composition groups between sampling times. However, only one vereda exhibited a reduction in functional richness, and neither showed temporal functional divergence. Woody encroachments are leading these veredas to an alternative state with a reduced herbaceous diversity, structurally denser, and with more resource-acquisitive plant traits in the community. The Woody encroachment reducing soil water availability, may impact ecosystem services, particularly water provision and biodiversity loss in the Cerrado region.

Appraisal of groundwater quality and hydrochemistry in three regions of Ghana: Implications for drinking purposes

Groundwater is the most relied upon source of water for rural areas and small communities with no access to national water systems. The Community Water and Sanitation Agency (CWSA) in Ghana is an institution that facilitates the provision of water and sanitation services to small towns and communities, hence it has engineered several boreholes all over the country. However, some of these boreholes have quality challenges. Hence this study was carried out to assess the quality and hydrochemical controls of such boreholes in the Ashanti, Upper East and Central Regions of Ghana. A total of 45 boreholes were sampled across these areas and subjected to physicochemical, microbial, and heavy metal analysis. Analysis of the groundwater in the Ashanti Region indicates that its quality is negatively impacted by its iron, manganese, and arsenic content. Same was observed for the Central Region. While in the Upper East Region, total hardness, fluoride, nitrate, and arsenic are the parameters that impact the groundwater quality greatly. Water quality index was used to assess the suitability of the groundwater for domestic purposes and based on this index, 80 % of the water samples were classified as either having an excellent or good quality, while about 7 % were classified as unsuitable for domestic purposes, across all regions. The suitability of the groundwater for irrigational purposes was assessed using sodium adsorption ratio (SAR), percentage sodium (% Na), and Kelly's index (KI). Based on SAR and % Na, all the water samples were suitable for irrigation, while 9 % were unsuitable based on KI. This study provides a comprehensive information on some of the CWSA boreholes with quality challenges. This kind of information is critical and useful when considering what options and treatment technologies would be suitable to address the challenges that these boreholes have.

Effects of paediatric schistosomiasis control programmes in sub-Saharan Africa: A systematic review.

Preventive chemotherapy by mass drug administration is globally recommended as the primary method of reaching the elimination of schistosomiasis, especially in the high risk-paediatric population. This systematic review provides a summary of the effects of paediatric schistosomiasis control programs on eliminating schistosomiasis in sub-Saharan Africa. A systematic search was conducted in PubMed, EBSCOhost, and other databases to obtain studies regarding the effects of paediatric schistosomiasis control programmes in sub-Saharan Africa. 3455 studies were screened for eligibility, included articles reported on both paediatrics control programmes and schistosomiasis, and articles were excluded when they did not report on schistosomiasis control programmes in paediatrics exclusively. 40 selected studies were critically appraised using the JBI critical appraisal tools for relevance and 30 studies were included in the study. An in-depth quantitative descriptive analysis was conducted, and a comprehensive narrative summary explained the results within the scope of the review questions. The results show that despite preventive chemotherapy lowering schistosomiasis prevalence, chances of re-infection are high in endemic areas. Preventive chemotherapy without complementary interventions including safe water provision and proper sanitation, snail control and health education on the aetiology of schistosomiasis, transmission pattern and control practices might not eliminate schistosomiasis.

How Carrying Capacity and Water Storage Capacity Are Doing Right Now in Mojokerto City ?

Water provision, a fundamental need of civilization, is necessary to balance population expansion in cities. Clean water supply is impacted by the deterioration of the environment brought on by the effects of civilization. As a result, it’s critical to understand how a region’s water availability and water demand combine to form its carrying capacity and capacity. This study aims to assess the capacity for carrying as well as the availability of clean water in Mojokerto City, Indonesia, which is situated in East Java. This study employs a technique whereby the connections between natural cycles are strengthened into mathematical modelling, which is then distributed utilising a grid system approach using ArcGis. The information used is secondary data, which contains both spatial (land cover and ecoregion) and non-spatial (population, index of environmental services for water suppliers, and average per capita water demand) information. With a total supply of 61,997,308.31 m3/year and a population of 133,303 according to the grid system, the study’ findings indicate that the City of Mojokerto generally has a status that has been exceeded or has a water deficit. The required amount of water is therefore 21,939,093 m3/year. The amount of clean water needed by the city of Mojokerto has therefore been exceeded by 40,058,215 m3/year.

Challenges and Opportunities in Ensuring the Welfare of Livestock during Transportation in Nigeria

Purpose: The aim of the study was to examine challenges and opportunities in ensuring the welfare of livestock during transportation in Nigeria Methodology: This study adopted a desk methodology. A desk study research design is commonly known as secondary data collection. This is basically collecting data from existing resources preferably because of its low cost advantage as compared to a field research. Our current study looked into already published studies and reports as the data was easily accessed through online journals and libraries. Findings: The study identified challenges, ranging from overcrowding and rough handling to inadequate rest and water provisions, underscore the need for comprehensive interventions to address welfare concerns effectively. Additionally, contextual factors such as regulatory variability, transporter perspectives, and geographical disparities further complicate the landscape of livestock transportation welfare. Unique Contribution to Theory, Practice and Policy: Theory of Planned Behavior & Social Exchange Theory may be used to anchor future studies on challenges and opportunities in ensuring the welfare of livestock during transportation in Nigeria. Promote the adoption of innovative technologies, such as GPS tracking, real-time monitoring systems, and automated watering and feeding systems, to improve the welfare of livestock during transportation. Advocate for the harmonization of welfare standards and regulatory frameworks across different jurisdictions to promote consistency and accountability in livestock transportation practices.

Dominant conservation parameters to control environmental destruction of oxbow lake in Kapuas River Basin, Indonesia

Global climate change has significantly impacted the ecosystem of a specific aquatic region, including its lake area. Lakes provide immense benefits in efforts to meet various needs and enhance community well-being. These include the provision of raw water for clean drinking, household and urban water supply, industry, supplemental irrigation for agriculture, hydroelectric power generation, and various other purposes. However, fluctuations in river water availability trigger adjustments in both the river flow patterns and their inherent characteristics. These modifications in land features and ecosystems have consequently brought the morphological transformations in rivers throughout the adjacent region. The characteristics and functions of oxbow lakes must be preserved, and conservation efforts must be undertaken. To maintain their functionality, it is essential to conduct a study to determine the dominant parameters that influence the characteristics of oxbow lakes. This study aims to identify the primary parameters for conservation efforts in oxbow lakes. Based on a field survey of physical conditions, most oxbow lakes exhibit suboptimal conditions, as nearly all water storage areas are already overgrown with wild vegetation and possess high sediment levels. It is essential to continuously monitor several parameters to maintain the performance of oxbow lakes. The results of this research show that the dominant parameters for the oxbow lake in west Kalimantan are divided into 3 (three) aspects: reservoir, oxbow lake embankment structure, and oxbow lake embankment crest.

Drinking water monitoring system with detection of ph level conditions in laying hens farms based on internet of things

The increase in egg-laying chicken population must be balanced with the increase in productivity. The productivity (quantity of eggs produced), which affects profitability, can be obtained with sufficient and high-quality drinking water (determined by its pH levels). One of the poultry farms in Jember, Rizqie Farm Partners, experienced a problem with the management of water and feed provision for the egg-laying chicken especially in rainy seasons. The farm is located in an open space and is approximately ±25 meters from the owner’s house, making monitoring and controlling of the drinking water irregular. It is pivotal to be disciplined in controlling the drinking water so that the chickens do not become stressed. The objective of the study is to develop a smart automated system for monitoring drinking water to increase the quality and quantity of egg production. Sensor data connected to the Arduino Uno was converted to an Android smartphone as a controlling and monitoring medium. The stages carried out included problem identification, literature study, data collection, system creation using the design sprint software development method, testing, and data analysis. The pH sensor test results on bottled mineral water, tap water, orange juice, water mixed with soil, and water mixed with vitamins for chickens were 3-8.27 for each type of water. The pH indicator paper as a comparison of the results with the sensor has an accuracy level of 85.06% and an error value of 14.94%.

Development of a Framework to Improve the Provision of Water, Sanitation, and Hygiene in Healthcare Facilities of Mwandi District in Western Province

Healthcare facilities (HCFs) require safe water, sanitation, hygiene, environmental cleaning, and waste management (WASH) in the provision of quality services to promote, restore, maintain, and improve health. However, the unavailability of studies on the challenges and opportunities of WASH services in HCFs of Mwandi District has limited the potential for improved health care and quality of life. Without proper elucidation, this has the potency to dissuade women from using HCFs for childbirth and healthcare, potentially increasing maternal mortality rates. To examine the challenges and opportunities in accessing safe WASH services in HCFs in Mwandi District, more of Qualitative techniques were utilized to gather data from 8 HCFs in Mwandi District. This involved initial observations employing the WASH Status Checklist, followed by focus group discussions with expectant mothers and 23 key informant interviews. Thematic analysis was used to analyse the data. The results showed that only half of the investigated facilities provided basic water services, hampered by water salinity issues. Even though most facilities had improved sanitation facilities, they, however, do not meet the basic sanitation standards. This was primarily due to issues such as corroded pipes, insufficient accessible toilets for people with disabilities, and the absence of menstrual hygiene facilities. Many facilities lacked gender-segregated staff facilities. Most of the facilities had functional hand hygiene facilities but also did not meet the basic standards due to a lack of soap for hand washing. A significant number encounter inefficiencies in cleaning protocols, and the majority face poor infrastructure conditions. The findings further revealed that these challenges stem from inadequate prioritization and funding for Water, Sanitation, and Hygiene (WASH) initiatives. The existing knowledge often concentrates on individual components, the findings stress the necessity for an integrated approach that collectively addresses water supply, sanitation, hygiene, and waste management. This holistic perspective can significantly contribute to the development of more effective guidelines and policies, offering a nuanced understanding of the interconnected nature of WASH components. Furthermore, the research sheds light on the pivotal role of localized political will, specifically highlighting the influence of Health Centre Advisory Committees (HAHC) in shaping governance at the community level, especially concerning WASH projects. The study offers a comprehensive overview of challenges and sustainability opportunities related to WASH services, crucial for their effective functioning. It emphasizes the necessity for heightened awareness and increased budget allocation for the sustainable maintenance of WASH services

Impacts of the Covid-19 pandemic on the South African water sector

An analysis of the impacts of the Covid-19 pandemic on the South African water sector is presented. The study identified and focused on three main themes: water revenue collection, water service delivery, and water sector operations. The Covid-19 pandemic negatively impacted these aspects and exacerbated pre-existing problems in the water provision landscape of South Africa. Business continuity management was identified as a top priority for water sector institutions in South Africa to ensure the continued provision of critical water services. In-depth case study research is recommended to establish how water sector institutions in South Africa dealt with the Covid-19 pandemic and how this can inform their disaster preparedness and management going forward.

Exploring the State of Municipal Water Supply Infrastructure

This paper explores the state of water infrastructure, concerning the obligation of the government municipal water supply agency (Plateau State Water Board) responsible for urban water supply. The study employs the qualitative method; a structured closed-ended questionnaire was prepared, and face-to-face interview was conducted with eight management staff of the board, thereafter interviews were transcribed verbatim and then analyzed using NVivo 12 software. Results from the analyses show that water infrastructures are in a deplorable state characterized by; bad condition of dams and water treatment plants, lack of stable electricity, lack of metering of customers as well as frequent cases of pipe bursts said to be connected to illegal connection by the residents of informal/slum settlements. The novelty of this study is anchored on the reality that infrastructure challenges negating the efficiency of PSWB were unveiled, and strategies that could improve and promote sustainability of water provision such as the ‘smart city’ concept that uses modern technology and ‘stakeholder’s involvement’ in the water governance process was suggested.

Integrated Analysis of Water Quality in Treatment Plants: Physicochemical and Biological Assessments

Water treatment plants (WTPs) play a crucial role in ensuring access to safe drinking water, essential for human health and well-being. This study focuses on the IPA Kedunguling, operated by the Regional Drinking Water Company Sidoarjo, which serves the residents of Sidoarjo city. The objective was to evaluate the water treatment process and quality using physical, chemical, and biological assessments in accordance with Ministry of Health Regulation No. 2/2023 and Government Regulation No. 66/2014. The process involves raw water intake at the Intake, followed by treatment at the WTP and distribution to residents. Laboratory tests revealed that chemical and biological parameters met regulatory standards; however, Total Dissolved Solid (TDS) levels exceeded permissible limits, highlighting a potential area for improvement. This study underscores the importance of continuous monitoring and optimization of water treatment processes to ensure the provision of safe drinking water to communities. Highlights : Water treatment plants ensure access to safe drinking water, vital for human health. Evaluation of IPA Kedunguling's water treatment process and quality according to regulatory standards. Laboratory tests identify areas for improvement, particularly in Total Dissolved Solid levels. Keywords: Water treatment plants, water quality assessment, regulatory compliance, drinking water safety, continuous monitoring.

Spatial and seasonal groundwater quality assessment for drinking suitability using index and machine learning approach

Spatial and seasonal evaluation and monitoring of groundwater (GW) quality is essential for the sustainable management of this priceless resource and the provision of safe drinking water. Nevertheless, GW quality appraisal was not given due attention in the current study area (flat terrain part of the Tana sub-basin). This study sought to assess the seasonal and regional physicochemical GW quality parameters for drinking appropriateness using the drinking water quality index (DWQI) and support vector machine (SVM). The main cations in both the dry and wet study seasons were, in decreasing order, Na+, Ca2+, Mg2+, K+, and Fe2+, according to the results. Conversely, the main anions were HCO3−, CO32−, Cl− or NO3−, SO42− and PO43−, ordered from higher to lower. During the two research seasons, Ca–HCO3 and Na–HCO3 were the predominant water types based on Piper diagram results. Reverse ion exchange and evaporation were the principal hydrogeochemical processes that control the hydrogeochemistry identified by Durov and Gibbs diagrams, respectively. Excellent GW quality class for drinking was demonstrated by the majority of geographical and seasonal DWQI readings over the two seasons. Nevertheless, during the rainy season, there was a noticeable decline in the GW quality condition around the northern shores of Lake Tana. Therefore, it is advised to implement comprehensive GW quality protection measures and improve system management to mitigate pollution to reduce health hazards in the examined region.

Coordinated response of endemic gastropods to Late Glacial and Holocene climate-driven paleohydrological changes in a small thermal pond of Central Europe

The thermal spring-fed Lake Pețea located in NW Romania southeast of the city of Oradea harbors a unique endemic warm water biota. It is the only location in Europe where thermal water endemic melanopsid Microcolpia parreyssii (Philippi, 1847) lived along with the highly endangered warm-water relict neritid Theodoxus prevostianus. Lake Petea’s evolution was mainly controlled by major climate-driven hydrological changes also seen in regional records. The hydrological changes were mainly controlled by varying input of thermal water due to recurring increased/decreased recharge of the underground karst water system. The driving factor was warming connected to the interstadial GI 1 increasing recharge by melting of regional ice sheets in the Late Glacial. Conversely, during the Younger Dryas (H0) and the Holocene increasing/decreasing moisture availability was in control. Low stands created multiple bottlenecks reducing genetic variability seen in the appearance of extreme morphologies during next rapid climate melioration. The studied gastropods responded mostly similarly to changes controlling the availability of elements in shell construction and habitat reduction leading to changes in shape, density, size. Periods of lower lake levels and reduced warm water input are characterized by the emergence of elongated tightly coiled shells while globular, compressed loosely coiled shells develop at times of warmer water provision and increased Mg availability. In size there is a contrasting trend. Namely globose Th. prevostianus shells are larger than the elongated ones. Conversely globose, compressed Microcolpia are generally smaller than their elongated spindle-shaped counterparts. In this sense the development of dwarf morphotypes in warmer water habitats is characteristic of Lake Pețea melanopsids. This type of dwarfism i.e. the reduction of shell size is lacking though in Lake Pețea neritids. Our findings also confirm the presence of various ecophenotypes of Microcolpia in the pond degrading our endemic species Mi. parreyssii to a variety of Mi. daudebartii.

Evaluasi dan Optimalisasi Penyediaan Air Bersih Berbasis Masyarakat (Studi Kasus: Kawasan Langara Pesisir, Kab. Konawe Kepulauan)

The Langara Coastal area is the economic center area of the capital city of Konawe Islands Regency. However, the provision of clean water as a basic need is still not fulfilled, this is because the source of clean water in the Langara Coastal Area currently still depends on Community Self-Help, as a result, water distribution is carried out in shifts. This research aims to determine air needs, the condition of the existing distribution network, and optimize the clean water distribution system. Air requirements are calculated using an analysis of population projections for 15 years. Analysis of pipe hydraulics using EPANET 2.2 Software, and air flow by gravity using PVC pipes. The analysis results show that the population in 2036 will be 1816 people with peak hour water demand of 4.13 l/sec. The condition of the existing distribution network shows that all Junctions have an average pressure of 9 atm. Meanwhile, the pipe with the highest speed at P3 is 0.47 m/s and the speed at P15 is 0.04 m/s, indicating that the existing conditions do not meet the technical criteria of Minister of PUPR Regulation No. 27/PRT/M/2016. So to increase the flow speed it is necessary to change the pipe dimensions at several points. In peak hour optimization simulations, the maximum speed occurs in pipes P2, P3, P4, and P10, namely 2.61 m/s, while the lowest speed occurs in pipe P21, namely 0.30 m/s. The results of this optimization are by the speed criteria in Minister of PUPR Regulation No.27/PRT/M/2016

Ecosystem services potential is declining across European capital metropolitan areas

Ecosystem services (ES) are essential to sustainable development at multiple spatial scales. Monitoring ES potential (ESP) at the metropolitan level is imperative to sustainable cities. We developed a procedure for long-term monitoring of metropolitan ESP dynamics, utilizing open-source land use land cover (LULC) data and the expert matrix method. We compared the ESP results of 38 European Capital Metropolitan Areas (ECMA) regarding biodiversity integrity, drinking water provision, flood protection, air quality, water purification, and recreation & tourism. Our results show significant declines in ESP across ECMA due to LULC alteration between 2006, 2012, and 2018. We found that ECMA in post-socialist European countries like Poland (Warszawa) have experienced high rates of land use transformation with a remarkable impact on ESP. Surprisingly, we found that Fennoscandinan ECMA, like Helsinki, Stockholm, and Oslo which lead the cumulative ESP ranking, faced the ESP reduction of the highest impact in recent years. The correlation analysis of ESP dynamics to urban expansion and population growth rates suggests that inattentive urbanization processes impact ESP more than population growth. We unveil the implications of our results to the EU and global level agendas like the European Nature Conservation Law and the Sustainable Development Goals.