Looking for new horizons in water treatment at Thuruwila Lake

Even though, the developed countries have put a great attention on the formation of disinfection by-products in chlorinated water, the developing countries still have to play a significant role on this. Consequently, the consumers are at a hidden threat, which has to be exposed. This paper talks about the possibility for formation of by-products in water treatment systems in Sri Lanka, giving special attention on formation of Trihelomethane. The Thuruwila Water Treatment Plant has been designed to provide water for the Anuradhapura Township and its suburbs. Even though the plant is equipped with advance water treatment technology, it faces many complex issues which are common for all the treatment plants, extract raw water from lakes or tanks at tropical conditions. However, there are many possible ways of contamination due to many anthropogenic activities such as excessive use of agro-chemicals, improper settlements, etc. The chemicals, consist of nitrogen and phosphorous, provide appropriate conditions to toxic algae for blooming at dry zone temperatures. This results very complex situation in water bodies, leading unknown health effects at the end. The writers of this paper expect to review the capability of advance water treatment technologies in surface water treatment and make critical evaluation on the available water treatment options to open new directions, regard to more convenient and acceptable water related infrastructure development in dry zone of the country

Backup support for sustainable RWS in Sri Lanka

In Sri Lanka, during the last few decades, many sector projects launched under international donor assistance have provided drinking water facilities in rural areas. Projects implemented at the beginning have concentrated on providing the facilities, with less emphasis on sustainability and no clear policy about the management responsibility. This saw the facilities provided becoming dilapidated or abandoned, making them ineffective in achieving ultimate objectives. It was also evident that when the communities served are dispersed, remote and relatively small, management by a central body is difficult. Hence, emphasis has lately been given to sustainability aspects, such as adopting demand driven approaches, making beneficiary communities responsible for management of facilities and recognising and empowering Community Based Organisations (CBOs)

Low cost GIS data base solution for water utility network in Sri Lanka

In 1999 National Water Supply and Drainage Board (NWSDB) commenced developing a Water Utility GIS for the Greater Colombo(GC) area with the objective of improving its operations and maintenance activities. National Survey Department of Sri Lanka was contracted out to produce 1:1000 scale 3D digital base maps from Air Photographs. Available water utility maps were digitized using Autocad Map GIS and updated using Global Positioning Systems and other survey methods. Due to voluminous nature of base maps and utility data it is impractical to store them as a one seamless coverage. Storing these data as separate map tiles leads to several practical constraints such as updating difficulties, searching delays and data retrieval problems. Therefore it is required to develop a Geo-database to efficiently manage these data. It is not feasible to utilize available commercial Geo-databases for this purpose due to their high purchasing and maintenance costs. As a solution PostgreSql, a free Open Source Object Relational Database Management System(ORDBMS) was selected. PostgreSql has a module called PostGIS which handles spatial data and is used by hundreds of similar organization around the world. The software successfully runs on Linux Operating System, which also is a freeware. Geo-database was established in PostgreSQL ORDBMS with necessary table structures, relations etc., to store and manage geometric/attribute data of water features including 3D basemap data. A user friendly interface was developed within Autocad Map GIS to handle data uploading and retrievals. All necessary procedures were introduced to the organization for the efficient management of the Geo-database. Further, an Intranet Web Map Browser was developed to browse the data. Currently the system has 18 themes with total objects of around 800,000 and successfully used by all Water Manager Regions in GC area for their day-to-day activities. This implemented solution provides an excellent platform for the NWSDB to do advance geo data management for low cost

User management for sustainable rural water resources

User management for sustainable rural water resource

Community training for successful management in rural water supply

Community training for successful management in rural water suppl

Capacity building for sustainable RWS in Sri Lanka

Capacity building for sustainable RWS in Sri Lank

MOESM1 of Synthesis and characterization of novel rhenium(I) complexes towards potential biological imaging applications

Additional file 1: Table S1. 1H NMR chemical shifts (ppm) of complexes 1–4 in D2O at 25 °C. 1H NMR chemical shifts (ppm) of complexes 1–4 in D2O at 25 °C. Figure S1. UV VIS spectra of L1 (top), Re(CO)3L1Br (2, middle) and [Re(CO)3L1(H2O)]+ (1, bottom). Figure S2. UV VIS spectra of L2 (top), [Re(CO)3L2(H2O)]+ (3, middle) and Re(CO)3L2Br (4, bottom). Figure S3. 1H-13C HSQC spectrum of a selected region of [Re(CO)3L1(H2O)]OTf (1) (25 °C, D2O, shifts in ppm). Figure S4. 1H-1H ROESY spectrum of a selected region of [Re(CO)3L1(H2O)]OTf (1) (25 °C, D2O, shifts in ppm). Figure S5. 1H-13C HSQC spectrum of a selected region of [Re(CO)3L2(H2O)]OTf (3) (25 °C, D2O, shifts in ppm). Figure S6. 1H-1H ROESY spectrum of a selected region of [Re(CO)3L2(H2O)]OTf (3) (25 °C, D2O, shifts in ppm)