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251.
Vijaya Gagrani John A. Diemer Jarrod J. Karl Craig J. Allan 《Journal of the American Water Resources Association》2014,50(1):128-142
The hydrologic and water quality benefits of an existing engineered stormwater control measures (SCMs) network, along with the alternative stormwater control simulations, were assessed in the rapidly urbanizing Beaverdam Creek watershed located in SE U.S. Piedmont region through the use of distributed Model of Urban Stormwater Improvement Conceptualization stormwater model. When compared with predevelopment conditions, the postdevelopment watershed simulation without SCMs indicated a 2 times increase in total runoff volume, 3 times average increase in peak flow for 1.5‐3.2 cm 6‐h storm events, and 30 times, 12 times, and 3 times higher total suspended solids (TSS), total phosphorous (TP), and total nitrogen (TN) loadings, respectively. The existing SCMs network, in comparison with the postdeveloped watershed without SCMs, reduced the average peak flow rates for 1.5‐3.2 cm 6‐h storm events by 70%, lowered the annual runoff volume by 3%, and lowered TSS, TP, TN annual loads by 57, 51, and 10%, respectively. A backyard rain garden simulation resulted in minimal additional reduction in TSS (1.6%), TP (0.4%), and TN (4%). Model simulations indicate that mandatory 85% TSS and 70% TP annual load reductions in comparison with the predevelopment levels would require the diversion of runoff from at least 70% of the contributing drainage areas runoff into additional offline bioretention basins. 相似文献
252.
Despite rapid growth in river restoration, few projects receive the necessary evaluation and reporting to determine their
success or failure and to learn from experience. As part of the National River Restoration Science Synthesis, we interviewed
39 project contacts from a database of 1,345 restoration projects in Michigan, Wisconsin, and Ohio to (1) verify project information;
(2) gather data on project design, implementation, and coordination; (3) assess the extent of monitoring; and (4) evaluate
success and the factors that may influence it. Projects were selected randomly within the four most common project goals from
a national database: in-stream habitat improvement, channel reconfiguration, riparian management, and water-quality improvement.
Roughly half of the projects were implemented as part of a watershed management plan and had some advisory group. Monitoring
occurred in 79% of projects but often was minimal and seldom documented biological improvements. Baseline data for evaluation
often relied on previous data obtained under regional monitoring programs using state protocols. Although 89% of project contacts
reported success, only 11% of the projects were considered successful because of the response of a specific ecological indicator,
and monitoring data were underused in project assessment. Estimates of ecological success, using three criteria from Palmer and others (2005), indicated that half or fewer of the projects were ecologically successful, markedly below the success level that project
contacts self-reported, and sent a strong signal of the need for well-designed evaluation programs that can document ecological
success. 相似文献
253.
Davis Lodinikki Lemoy Aragão Walessa Alana Bragança de Oliveira Lopes Géssica Eiró Luciana Guimaraes Freire Alexandre Rodrigues Prado Felippe Bevilacqua Rossi Ana Cláudia da Silva Cruz Allan das Graças Fernandes Dantas Kelly Albuquerque Alan Rodrigo Leal Paz Simone Patricia Aranha Angélica Rômulo Simões Lima Rafael Rodrigues 《Environmental science and pollution research international》2022,29(10):13930-13940
Environmental Science and Pollution Research - There are a few data relating to the effects of lead (Pb) exposure on the alveolar bone, which has very distinct morphophysiological characteristics... 相似文献