Hydrologic unit maps

TL;DR: In this paper, the authors show that dams fragment the fluvial system of the continental United States and that their impact on river discharge is several times greater than impacts deemed likely as a result of global climate change.

TL;DR: In this article, the authors address the following two questions: 1) What are the loads (flux) of nutrients transported from the Mississippi-Atchafalaya River Basin to the Gulf of Mexico, and where do they come from within the basin? 2) What is the relative importance of specific human activities, such as agriculture, point-source discharges, and atmospheric deposition in contributing to these loads?

TL;DR: It is found that river runoff times fertilizer N input was the major predictive term, explaining 76% of the variation in the model, and the greatest nitrate N yields corresponded to the highly productive, tile-drained cornbelt from southwest Minnesota across Iowa, Illinois, Indiana, and Ohio.

TL;DR: In this paper, two monthly MODIS 1-km ET products, MODIS global ET (MOD16) and Operational Simplified Surface Energy Balance (SSEBop) ET, are validated over the conterminous United States at both point and basin scales.

TL;DR: A land use and land cover classification system for use with remote sensor data provides a standardized framework for classifying land use and land cover throughout the country.

TL;DR: The National Water Data Network (NWDN) as discussed by the authors is an example of a water data collection and management system that uses a catalog of information on water data, which is maintained and used as the basis for planning and operation of the network.