The Role of Municipalities in Achieving Water Security

The world has realized the fact that the limited resources can't be sustainable for a long time. Sustainable transformation is a key issue to save the current resources and natural environment for the next generation. 2030 Sustainable Development Goals (SDGs) can help governments to focus on main issues to achieve a balance between social, environmental, and economic development. At this point, Goal 6 points out the importance of saving clean and safe freshwater resources. This chapter aims to present the link between municipalities and water security in Turkey. Turkey case was selected according to its risky position in the level of water stress. This study used recent reports and statistical data on environmental indicators related with freshwater resources and the implications of municipalities in Turkey. Environmental Indicators 2020 Report guided the authors to determine water indicators in Turkey. In addition, the available open access data from TURKSTAT is used to determine water supply services of municipalities.

General overview of freshwater resources

General overview of freshwater resources

Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island

Freshwater resources on small coral islands mainly exist in the form of freshwater lenses. The freshwater lens is highly vulnerable to salinization due to natural recharge variations and urbanization construction. However, it is unclear how a freshwater lens evolves under the influence of urbanization construction and which factors control its evolution. Based on the hydrogeological data of a small coral island in China, a corresponding 3D numerical model was established by the Visual MODFLOW software to investigate the formation and evolution of freshwater lenses under natural conditions. Thereby, the island reclamation scenario and impermeable surface scenario were set up and the changes in morphology and volume of the freshwater lens were analyzed. The results show the following: (1) After island reclamation and island building, the freshwater lens would reach a stable state after 25 years and the freshwater lens would also appear in the newly added part of the island with a thickness of 9.5 m, while the volume of the total freshwater lens would increase to 1.22 times that of the original island. (2) When the impermeable surface is built at different positions of the island, the reduction in the volume of the freshwater lens, in the order from large to small, is Scenario B (northeast side), Scenario A (southwest side) and Scenario C (central); with the increase in the impermeable surface area, the volume of the freshwater lens would gradually decrease and the volume of the freshwater lens would decrease by more than 50% with the impermeable surface exceeding 30% of the island area. The study has important implications for the conservation and rational development of subsurface freshwater resources on islands.

Retrieval of Water Quality from UAV-Borne Hyperspectral Imagery: A Comparative Study of Machine Learning Algorithms

The rapidly increasing world population and human activities accelerate the crisis of the limited freshwater resources. Water quality must be monitored for the sustainability of freshwater resources. Unmanned aerial vehicle (UAV)-borne hyperspectral data can capture fine features of water bodies, which have been widely used for monitoring water quality. In this study, nine machine learning algorithms are systematically evaluated for the inversion of water quality parameters including chlorophyll-a (Chl-a) and suspended solids (SS) with UAV-borne hyperspectral data. In comparing the experimental results of the machine learning model on the water quality parameters, we can observe that the prediction performance of the Catboost regression (CBR) model is the best. However, the prediction performances of the Multi-layer Perceptron regression (MLPR) and Elastic net (EN) models are very unsatisfactory, indicating that the MLPR and EN models are not suitable for the inversion of water quality parameters. In addition, the water quality distribution map is generated, which can be used to identify polluted areas of water bodies.

Exploitation of Antarctic Iced Freshwater: A Call To Unfreeze Legal Discourse

While discussed within the Antarctic Treaty System during the 1970s-1980s, the idea of iceberg harvesting was laid on ice due to the lack of adequate technologies and scientific knowledge on the potential environmental implications. However, the State Parties to the ATS envisioned the possibility of reopening the legal discourse. For that purpose, iced freshwater resources exploitation was excluded from the scope of the Madrid Protocol containing a ban on all mineral mining activities within the scope ratione loci of the ATS. However, during the negotiations, it was agreed that if the prospect of iceberg harvesting was ever to be realised, the environmental protection provisions under the Madrid Protocol should apply. The present paper provides an analysis of whether the potential exploitation of iced freshwater resources proves realistic within the existing legal framework under the Antarctic Treaty System and the United Nations Convention on the Law of the Sea and discusses which rules States would need to adhere to when engaging in such activities. It arrives at the conclusion that, as to now, there is no prohibition of iceberg harvesting for freshwater use under international law. Nevertheless, both within the scope of the ATS and in the high seas, environmental regulations restrict the implementation of the activity and, therefore, require comprehensive environmental impact assessments to be conducted before the commencement of the activity. Furthermore, as ownership allocation of icebergs is not regulated under the relevant treaties, the present paper examines two legal regimes that may potentially govern iceberg acquisition in the high seas, namely, res nullius and res communis. Finally, as private efforts have become more far-reaching in the recent decades, an overview of the current state of practice is presented, highlighting the observed advantages and potential drawbacks. Conclusively, the present paper advocates for the reopening of the legal discourse on the subject matter before the commencement of exploitation activities so as to ensure that the fragile Antarctic environment is protected and preserved for the benefit of all humankind in accordance with the object and purpose of the ATS.

Predicting Intent to Conserve Freshwater Resources Using the Theory of Planned Behavior (TPB)

Freshwater resources are being rapidly depleted by unsustainable human activities in the United States (U.S.), causing concern for water security. If individuals were targeted with appropriate information, public engagement in water conservation may increase. Political affiliation and ideology may play a role in grouping individuals based on their engagement in water conservation, as environmental issues are politically contentious in the U.S. The purpose of the study was to determine if political affiliation, political ideology, and theory of planned behavior variables related to water conservation predicted intent to engage in water conservation. Data were collected from 1049 U.S. residents using non-probability opt-in sampling methods. Descriptive statistics and multiple linear regression models were used to analyze the data via the Statistical Package for the Social Sciences (SPSS) 26. The results from a multiple linear regression model revealed that political affiliation, political ideology, attitude, subjective norms, and perceived behavioral control predicted 27.5% of variance in respondents’ intent to engage in water conservation; however, the variance accounted for was mostly attributed to theory of planned behavior variables. The findings have implications for environmental communication, namely focusing on increasing subjective norms towards water conservation.

Antibiogram Profile of Acinetobacterbaumannii Recovered from Selected Freshwater Resources in the Eastern Cape Province, South Africa

Acinetobacter species have been found in a variety of environments, including soil, food, plants, hospital environments and water. Acinetobacter baumannii is an opportunistic and emerging waterborne pathogen. It has been implicated in several nosocomial infections that demonstrate resistance to commonly administered antibiotics. We investigated phenotypic antibiotic resistance (PAR) and relevant antibiotic resistance genes (ARGs) in A. baumannii isolated from three freshwater resources in the Eastern Cape Province, South Africa; A. baumannii (410) was confirmed by the recA and gyrB genes of 844 suspected Acinetobacter species in the water samples. The PAR of the confirmed isolates was assessed using a panel of 11 antibiotics by the disc diffusion method, while ARGs were investigated in isolates exhibiting PAR. The A. baumannii isolates were resistant to piperacillin-tazobactam (11.2%), ceftazidime (12%), cefotaxime (18.8%), cefepime (8.8%), imipenem (2.7%), meropenem (4.15%), amikacin (2.4%), gentamicin (8.8%), tetracycline (16.8%), ciprofloxacin (11%) and trimethoprim/sulfamethoxazole (20.5%). For multidrug resistance (MDR), two isolates were resistant to all antibiotics and 28 isolates were resistant to imipenem and meropenem. Moreover, β-lactamases blaTEM (64.4%) and blaOXA-51 (28.70%) as well as sulphonamides sul1 (37.1%) and sul2 (49.4%) were common ARGs. Overall, PAR and ARGs had positive correlations (r) in all rivers. Detection of MDR-A. baumannii in freshwater resources could be linked to possible wastewater discharge from the nearby animal farms, indicating potential implications for public health.