Water quality assessment using Web-based GIS and distributed database management systems: Concept development and application to Lower Rio Grande (Texas, Mexico)

A fundamental problem in water quality assessment is the development and implementation of the analysis tools. One has to perform a series of steps such as data mining, map generation and simulating and interpreting models. These isolated steps can lead to lack of integration and limited coordination. The objective of this research is to develop a multipurpose spatial decision support system where decision makers, stakeholders and public are provided with data, maps and assessment tools over the web. Temporal data is incorporated with Spatial System and are stored in a distributed database to test its adequacy over the web. Web based Geological Information System (GIS) was used to visualize and assess water quality over the web for an end user with minimum knowledge and computing experience. The Spatial Decision Support System was developed for this study focuses on the Lower Rio Grande river basin. Water quality data for the study region from various sources were obtained and stored in a relational database management system. The stored data was provided over the web using a graphical user interface with water quality assessment tools and tools to identify different management options. The availability of data and assessment tools over the web is expected to increase public participation in decision-making process and effectiveness of water quality assessment over the web.