Distributed watershed hydrological and erosion modeling is gaining popularity in recent years due to increased computing power and availability of detailed spatial hydrological data. Models of this type are widely believed to provide greatest opportunities to examine hydrologic impact of land use change and climate change (Sharika et al. 2000); they also have immense utility to forecast the mov...

*Thomas J. Trout, USDA-Agricultural Research Service, Water Management Research Laboratory, 9611 S. Riverbend Ave. Parlier, CA 93658. *Corresponding author: [email protected] ABSTRACT Sediment data were collected in southern Idaho irrigation furrows. Irrigation furrows allow detailed study of sediment transport relationships because of gradually decreasing flow rates in long, uniform, ...

Mobile location-based services usually access large geo databases via a wireless network. Sometimes it is useful to store a certain amount of geo objects on the mobile device. In this paper we present an approach to store geo data in an embedded SQL database on smart phones. Besides the storage of geometries in SQL tables we have to provide an efficient geometric indexing mechanism. We used the...