From Royal Canal to Neglected Canal? Changing Use and Management of a Traditional Canal Irrigation System in Peri-Urban Kathmandu Valley

In this chapter we discuss the changing uses and management of a traditional canal irrigation system against the background of processes of urbanization in Kathmandu Valley in Nepal. Until urbanization of Kathmandu Valley took off in the 1980s, the management of stream-fed canal irrigation systems had been a priority of both state agencies and the population that depended on agriculture-based livelihoods. The name rajkulo (royal canal) given to these systems expresses the historical interests of (royal) state actors in canal maintenance and management. Fed by a stream called Mahadev Khola in Dadhikot, a peri-urban village in Kathmandu Valley, Mahadev Khola Rajkulo is such a traditional canal irrigation system. Using an in-depth case study of this system, we analyse the interlinkages of demographic, socio-environmental, economic and local political dynamics with the changing canal uses and management. More specifically, we discuss how and why various actors became associated with, or dissociated from, canal use and management in recent times, and what these processes mean for water access, rights and security. We reflect on the implications of these changes for canal management and canal-related conflicts, against the background of national urban policies that formally aim to conserve agricultural land in Kathmandu Valley, but stimulate urban expansion in practice.

Kebakaran Hutan dan Lahan di Pulau Rupat, Riau

Forest and land fires in Riau province generally occur on peatlands. This is due to the large area of ​​peatlands and intensive land conversion. Peat fires result in high PM 2.5 pollutant content, as happened on Rupat Island, Meranti Islands. Rupat Island has a history of repeated cases of forest and land fires in 2015 and 2019. This study aims to analyze the background of the causes of forest and land fires on Rupat Island, Riau Province. The research was carried out through several stages, namely data collection, data processing and data analysis. Forest fires on Rupat Island caused PM 2.5 content in February and March to have values ​​above the PM 2.5 content threshold. Based on the results of the study, it is known that the background causes of forest and land fires on Rupat Island, Riau, are caused by poor canal management, damaged peat conditions and the influence of the arrival of El Nino. This is the cause of the widespread forest and land fires on Rupat Island. Keywords: forest fires, peat land, Rupat island

ANALYSIS OF THE SCADA DISPATCH CONTROL AND MONITORING SYSTEM ON THE BUSTON CHANNEL

The article considers various variants of the concept of building a simpler SCADA system on the Buston Canal and conducts a comparative analysis to select the most suitable one for the Buston Canal management system, according to the project "Improving water Resources Management in South Karakalpakstan".

The parallel approach to issue of operational management optimization problem on transport gateway system

The universal parallelization software shell for joint data processing, implemented in combination with a distributed computing system, is considered. The research purpose – to find the most effective solution for the navigable canal management information system organizing. One optimization option is to increase computer devices computing power by combining them into a single computing cluster. The management optimizing task of a locked shipping channel for execution to adapt in a multi-threaded environment is proposed with constraints on a technologically feasible schedule. In article shows algorithms and gives recommendations for their application in the subtasks formation in parallel processing case, as well as on a separate thread. The proposed approach to building a tree of options allows you to optimally distribute the load between all resources multi-threaded system any structure.

THE ANTIBACTERIAL EFFECT OF A DIODE LASER USED AS AN ADJUNCT IRRIGANT ON CLINICAL ISOLATE OF ENTEROCOCCUS FAECALIS BIOFILM (IN VITRO)

Objective: The elimination of bacteria from the root canal has always been a problem in root canal management, and Enterococcus faecalis often found in the persistent intraradicular infections that occur after poor or unsuccessful endodontic treatments. The use of an irrigant with a diode laser adjunct eliminates this bacteria. To analyze and compare the effectiveness of a diode laser, chlorhexidine 2%, and natrium hypochlorite 2.5% on a clinical isolate of E. faecalis biofilms.Methods: Using E. faecalis biofilms from clinical isolate were grown on microtiter well plate, incubated for 24 h and subjected to the following treatments: Natrium hypochlorite 2.5% (5 s), chlorhexidine 2% (5 s), natrium chloride 0.9% (5 s), and the irrigants with additional diode laser irradiation (980 nm, 15 Hz, 1.5 W, 3.5 J, 5 s). The antibacterial effects of the irrigants and diode laser were scored using colony form units (CFU).Results: The clinical isolate colony of E. faecalis that was exposed to a saline solution and diode laser application had the highest score (18700 CFU/ml), while the lowest score (80,00 CFU/ml) was recorded in the group that was exposed to a chlorhexidine 2% irrigant with additional diode laser application.Conclusion: The diode laser had an antibacterial effect on a clinical isolate of E. faecalis biofilm, and this effect was increased when it was used in addition to the application of chlorhexidine 2% and natrium hypochlorite 2.5% irrigants.

GoRoSoBo: an overall control diagram to improve the efficiency of water transport systems in real time

Agriculture plays an important part in the food chain and water resources for agriculture are essential. A problem is that the water transport systems present low efficiencies in practice. Crop yields must be optimized, and the goal of an operational water manager is to deliver water to irrigation sites accurately and efficiently. In order to fulfill this objective, we propose a centralized overall control diagram to optimize the management of the canal. Our control diagram in real time is mainly composed of two algorithms, CSE and GoRoSoBo. The first one is a powerful tool in canal management, and is able to estimate the real extracted flow in the canal and the hydrodynamic canal state from measured level data at selected points. The second one is an essential tool in the management of the canal, a feedback control algorithm operating in real time. The GoRoSoBo algorithm (Gómez, Rodellar, Soler, Bonet) is able to calculate the optimum gates trajectories for a predictive horizon taking into account the current canal state and the real extracted flow, both obtained by CSE.