The area burned annually by wildfires is expected to increase worldwide due to climate change. Burned areas increase soil erosion rates within watersheds, which can increase sedimentation in downstream rivers and reservoirs. However, which watersheds will be impacted by future wildfires is largely unknown. Using an ensemble of climate, fire, and erosion models, we show that postfire sedimentation is projected to increase for nearly nine tenths of watersheds by >10% and for more than one third of watersheds by >100% by the 2041 to 2050 decade in the western USA. The projected increases are statistically significant for more than eight tenths of the watersheds. In the western USA, many human communities rely on water from rivers and reservoirs that originates in watersheds where sedimentation is projected to increase. Increased sedimentation could negatively impact water supply and quality for some communities, in addition to affecting stream channel stability and aquatic ecosystems.
Faculty and students are increasingly faced with the opportunity to use electronic versions of textbooks (e-texts). Despite the advantages of e-texts and recent advances in technology, evidence suggests that students are still reluctant to adopt and use e-texts. This situation leads us to investigate two research questions: What factors contribute to students’ acceptance of e-texts? Are there differences between hardcopy texts and e-texts when it comes to course grade? We draw on a variety of perspectives (i.e., psychology, management information systems, economics, environmental studies) to build a framework that allows us to determine the motivations of students for adopting e-texts, and the learning outcomes of e-text adoption. Data was collected via a survey administered in the business school of a metropolitan university with approximately 20,000 students, located in the western United States. Results suggest that perceived ease-of-use and the price of e-texts relative to hardcopy texts are two key motivators in e-text adoption, while perceived usefulness, Internet self-efficacy and environmental concerns are not significant motivators. However, there was no significant difference in the grades of e-text adopters compared to hardcopy adopters. We conclude this paper by discussing the implications of our findings for educators
We conduct a hedonic analysis to estimate the response of agricultural land use to water supply information under the Prior Appropriation Doctrine by using Idaho as a case study. Our analysis includes long-term climate (weather) trends and water supply conditions as well as seasonal water supply forecasts. A farm-level panel data set, which accounts for the priority effects of water rights and controls for diversified crop mixes and rotation practices, is used. Our results indicate that farmers respond to the long-term surface and ground water conditions as well as to the seasonal water supply variations. Climate change-induced variations in climate and water supply conditions could lead to substantial damages to irrigated agriculture. We project substantial losses (up to 32%) of the average crop revenue for major agricultural areas under future climate scenarios in Idaho. Finally, farmers demonstrate significantly varied responses given their water rights priorities, which imply that the distributional impact of climate change is sensitive to institutions such as the Prior Appropriation Doctrine.
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