PubMed · 10292336
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E R Gibbons. 1989. Quality needed for summer programs.. https://pubmed.ncbi.nlm.nih.gov/10292336/
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The Veteran's Fishing section of the Blackledge River in central Connecticut was relocated in the late 1950s. The relocation resulted in an unstable channel despite extensive efforts to prevent erosion. Overbank erosion and meander cutoffs were investigated using detailed survey data, characterizations of sediment deposits, flow modeling, and a moment-stability analysis. Limited reworking of revetment boulders indicate that riprap bank material was immobile during a 1979 flood event responsible for the formation of the cutoff channel. A moment-stability analysis factor-of-safety value of 1.1 supports the conclusion that riprap was not directly eroded from the banks. Alluvial particles with d(95) values ranging up to 120 mm were deposited along a bar downstream from the cutoff channel at flows estimated to be below a 1.5-year recurrence interval flow. Development of the bar deposit resulted in locally elevated water surfaces at high flow. The resulting overbank flow across the meander neck to the adjacent downstream bend led to the creation of an upstream migrating knickpoint, the erosion of approximately 16,000-year-old sediments, and the subsequent meander cutoff. The results of the study indicate that traditional erosion-control measures cannot prevent extreme channel adjustments if the geomorphic processes that control sediment continuity also are not considered.
BACKGROUND: Depression is common in patients with end-stage renal disease (ESRD) and is associated with increased mortality, but little is known about depression in patients just after they start dialysis therapy. We sought to assess the prevalence of depressive symptoms in patients with ESRD starting dialysis therapy, identify patient characteristics associated with depression, and determine whether patients with serious depressive symptoms were receiving treatment. METHODS: We implemented a multicenter prospective cohort study at 14 dialysis centers in Connecticut. Patients with ESRD who were 18 years and older were interviewed within 10 days of initiating dialysis therapy between November 2000 and July 2001. The Beck Depression Inventory (BDI) was used to assess depressive symptoms. Chi-square tests were used to evaluate associations between several patient characteristics and depression, and multivariable logistic regression models were used to determine odds ratios (ORs) for depression, with adjustment for baseline variables. RESULTS: Among 123 patients, 44% (54 of 123 patients) had scores above the validated cutoff value in the BDI for depression. In logistic regression analysis, depression was statistically significantly associated with Caucasian race (OR, 3.4; P = 0.02), lower self-rated quality of life (OR, 2.2; P = 0.003), and no previous acquaintances on dialysis therapy (OR, 10.2; P = 0.03). Only 16% (9 of 54 patients) of depressed patients were being treated at enrollment; 13% (5 of 38 patients) of those with mild symptoms and 25% (4 of 16 patients) with more severe symptoms were being treated. CONCLUSION: Our results show that depressive symptoms are very common at the start of dialysis therapy, and specific characteristics are associated with a greater burden of depressive symptoms. Despite a high prevalence, treatment rates are low, even among patients with moderate to severe symptoms of depression.
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