Regulated Rivers-research & Management最新文献_第9页

Mortality of riparian box elder from sediment mobilization and extended inundation

Regulated Rivers-research & Management Pub Date : 1999-09-01 DOI: 10.1002/(SICI)1099-1646(199909/10)15:5<463::AID-RRR559>3.0.CO;2-Z

J. Friedman, G. Auble

{"title":"Mortality of riparian box elder from sediment mobilization and extended inundation","authors":"J. Friedman, G. Auble","doi":"10.1002/(SICI)1099-1646(199909/10)15:5<463::AID-RRR559>3.0.CO;2-Z","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1646(199909/10)15:5<463::AID-RRR559>3.0.CO;2-Z","url":null,"abstract":"To explore how high flows limit the streamward extent of riparian vegetation we quantified the effects of sediment mobilization and extended inundation on box elder (Acer negundo) saplings along the cobble-bed Gunnison River in Black Canyon of the Gunnison National Monument, Colorado, USA. We counted and aged box elders in 144 plots of 37.2 m2, and combined a hydraulic model with the hydrologic record to determine the maximum shear stress and number of growing-season days inundated for each plot in each year of the record. We quantified the effects of the two mortality factors by calculating the extreme values survived during the lifetime of trees sampled in 1994 and by recounting box elders in the plots following a high flow in 1995. Both mortality factors can be modeled as threshold functions; box elders are killed either by inundation for more than 85 days during the growing season or by shear stress that exceeds the critical value for mobilization of the underlying sediment particles. Construction of upstream reservoirs in the 1960s and 1970s reduced the proportion of the canyon bottom annually cleared of box elders by high flows. Furthermore, because the dams decreased the magnitude of high flows more than their duration, flow regulation has decreased the importance of sediment mobilization relative to extended inundation. We use the threshold functions and cross-section data to develop a response surface predicting the proportion of the canyon bottom cleared at any combination of flow magnitude and duration. This response surface allows vegetation removal to be incorporated into quantitative multi-objective water management decisions. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":306887,"journal":{"name":"Regulated Rivers-research & Management","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131056051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 150

Movement and summer habitat of brown trout (Salmo trutta) below a pulsed discharge hydroelectric generating station 脉冲放电水电站下褐鳟的运动和夏季栖息地

Regulated Rivers-research & Management Pub Date : 1999-09-01 DOI: 10.1002/(SICI)1099-1646(199909/10)15:5<395::AID-RRR556>3.0.CO;2-1

C. Bunt, S. Cooke, C. Katopodis, R. Mckinley

{"title":"Movement and summer habitat of brown trout (Salmo trutta) below a pulsed discharge hydroelectric generating station","authors":"C. Bunt, S. Cooke, C. Katopodis, R. Mckinley","doi":"10.1002/(SICI)1099-1646(199909/10)15:5<395::AID-RRR556>3.0.CO;2-1","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1646(199909/10)15:5<395::AID-RRR556>3.0.CO;2-1","url":null,"abstract":"Radiotelemetry was used to investigate detailed movement and summer habitat of brown trout Salmo trutta (size range 157–488 mm TL, n=18) in the Kananaskis River, Alberta. Flows in the Kananaskis River respond to pulsed daily discharge from an upstream hydroelectric generating facility (range 0.15–25 m3 s−1). Wetted area available for brown trout doubled during periods of high flow. Fluctuating river levels did not appear to influence the degree to which brown trout moved within the study site. However, there was evidence that brown trout used cover and pools more as discharge increased. During high flow conditions, brown trout used similar depths (63 cm), and significantly lower surface water velocities than during low flow conditions. Brown trout also moved closer to shore into interstitial spaces among woody debris and root complexes during high flow. Pool habitats were used most often compared with all other habitat types combined. Pools with large woody debris accounted for 75% of all habitat observations. Woody debris was used more often than all other cover types. Results of the study indicate that the effects of river regulation on brown trout appear to have been moderated by woody debris in pools and along river banks, which provided refuge from high water velocities during periods of high flow. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":306887,"journal":{"name":"Regulated Rivers-research & Management","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126277148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 93

Impact of the residual flow on the physical characteristics and benthic community (algae, invertebrates) of a regulated Mediterranean river: the Durance, France 法国杜朗斯河:一条受管制的地中海河流的剩余流量对其物理特性和底栖生物群落(藻类、无脊椎动物)的影响

Regulated Rivers-research & Management Pub Date : 1999-09-01 DOI: 10.1002/(SICI)1099-1646(199909/10)15:5<441::AID-RRR558>3.0.CO;2-9

A. Cazaubon, J. Giudicelli

引用次数: 71

Rodent use of anthropogenic and ‘natural’ desert riparian habitat, lower Colorado River, Arizona 啮齿动物使用人为和“自然”的沙漠河岸栖息地，科罗拉多河下游，亚利桑那州

Regulated Rivers-research & Management Pub Date : 1999-09-01 DOI: 10.1002/(SICI)1099-1646(199909/10)15:5<377::AID-RRR549>3.0.CO;2-Q

D. C. Andersen, S. Nelson

引用次数: 16

Floods: physical processes and human impacts, K. Smith and R. Ward. John Wiley & Sons, Chichester, 1998. No. of pages: 382. Price: £65.00 ISBN 0‐471‐95248‐6. 《洪水:物理过程与人类影响》，史密斯、沃德著。John Wiley & Sons，奇切斯特，1998年。不。页数:382。价格:£65.00 ISBN 0‐471‐95248‐6。

Regulated Rivers-research & Management Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1646(199907/08)15:4<374::AID-RRR543>3.0.CO;2-K

D. Hannah

引用次数: 12

Ecological monitoring of fish assemblages downstream of a hydroelectric dam in French Guiana (South America) 法属圭亚那(南美洲)水电站大坝下游鱼类群落生态监测

Regulated Rivers-research & Management Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1646(199907/08)15:4<339::AID-RRR546>3.0.CO;2-0

B. Mérona, P. Albert

{"title":"Ecological monitoring of fish assemblages downstream of a hydroelectric dam in French Guiana (South America)","authors":"B. Mérona, P. Albert","doi":"10.1002/(SICI)1099-1646(199907/08)15:4<339::AID-RRR546>3.0.CO;2-0","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1646(199907/08)15:4<339::AID-RRR546>3.0.CO;2-0","url":null,"abstract":"Dam impacts on the downstream section of dammed rivers are known to be important for fish because of changes in the physical and chemical river characteristics. However, the available data seem to be insufficient to draw general conclusions regarding the transformation of fish communities. A hydroelectric dam was built on the Sinnamary River in French Guiana and closed in January 1994. From December 1991 to December 1996 fish collections were made from the downstream section. The results show a rapid decrease in fish abundance in the middle downstream course immediately after dam closure. This low abundance was observed until the end of the filling phase, when the flow was maintained at a minimum level. Afterwards, abundance returned to a level comparable with that prior to dam closure. Fish collection in different zones showed that the decrease in abundance was probably due to the escape of fish to shelter areas. Another marked effect was the reduction of sample diversity due to a decrease in species richness, as well as in the regularity of the distribution of species’ relative abundance. Examination of biological traits of species suggests that under these conditions feeding strategies could have been the most important factor affecting the abundance of populations. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":306887,"journal":{"name":"Regulated Rivers-research & Management","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124265331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

Reaction of silver eels to artificial light sources and water currents: An experimental deflection study 银鳗对人工光源和水流的反应:实验偏转研究

Regulated Rivers-research & Management Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1646(199907/08)15:4<365::AID-RRR552>3.0.CO;2-K

R. H. Hadderingh, G. V. Aerssen, Ronja Beijer, G. Velde

引用次数: 37

Estimation of geomorphically significant flows in alpine streams of the Rocky Mountains, Colorado (USA) 美国科罗拉多州落基山脉高山溪流中重要地貌流量的估算

Regulated Rivers-research & Management Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1646(199907/08)15:4<273::AID-RRR519>3.0.CO;2-B

N. Surian, E. Andrews

{"title":"Estimation of geomorphically significant flows in alpine streams of the Rocky Mountains, Colorado (USA)","authors":"N. Surian, E. Andrews","doi":"10.1002/(SICI)1099-1646(199907/08)15:4<273::AID-RRR519>3.0.CO;2-B","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1646(199907/08)15:4<273::AID-RRR519>3.0.CO;2-B","url":null,"abstract":"Streamflows recorded at 24 gauging stations in the Rocky Mountains of Colorado were analyzed to derive regional regression equations for estimating the natural flow duration and flood frequency in reaches where the natural flows are unknown or have been altered by diversion or regulation. The principal objective of this analysis is to determine whether the relatively high, infrequent, but geomorphically and ecologically important flows in the Rocky Mountains can be accurately estimated by regional flow duration equations. The region considered in this study is an area of relatively abundant runoff, and, consequently, intense water resources development. The specific streams analyzed here, however, are unaltered and remain nearly pristine. \u0000 \u0000 \u0000 \u0000Regional flow duration equations are derived for two situations. When the mean annual discharge is known, flows ≧10% of the time can be estimated with an uncertainty of ±9% for the 10% exceedance flow, to ±11% for the 1.0% exceedance flow. When the mean annual discharge is unknown, the relatively high, infrequent flow can be estimated using the mean basin precipitation rate (in m3/s), and basin relief with an uncertainty of ±23% for the 10% exceedance flow to ±21% for the 1.0% exeedance flow. The uncertainty in estimated discharges using the equations derived in this analysis is substantially smaller than has been previously reported, especially for the geomorphically significant flows which are relatively large and infrequent. The improvement is due primarily to the quality of streamflow records analyzed and a well-defined hydrologic region.","PeriodicalId":306887,"journal":{"name":"Regulated Rivers-research & Management","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116053791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Assessing the degree of preservation of landscape, natural and cultural–historical values in river dike reinforcement planning in the Netherlands 评估荷兰河堤加固规划中对景观、自然和文化历史价值的保护程度

Regulated Rivers-research & Management Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1646(199907/08)15:4<325::AID-RRR545>3.0.CO;2-G

H. Lenders, M. Huijbregts, Bram G. W. Aarts, C. Turnhout

{"title":"Assessing the degree of preservation of landscape, natural and cultural–historical values in river dike reinforcement planning in the Netherlands","authors":"H. Lenders, M. Huijbregts, Bram G. W. Aarts, C. Turnhout","doi":"10.1002/(SICI)1099-1646(199907/08)15:4<325::AID-RRR545>3.0.CO;2-G","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1646(199907/08)15:4<325::AID-RRR545>3.0.CO;2-G","url":null,"abstract":"The Dutch river district is highly valued for its landscape, natural and cultural–historical elements (also called LNC values). According to the current Dutch policy on river dike reinforcements, these values should be safeguarded in planning and executing river dike reinforcement projects by following the ‘selective smart design strategy’. This paper presents an audit model, consisting of 20 modules, assessing the extent to which LNC values are taken into account in the planning process. The model was tested on eight projects and appeared to fit the objectives very well. The assignment of weighting constants used to interconnect the individual modules, however, would be improved if all parties involved could achieve consensus on this issue. The test results showed that in five of the eight projects examined, LNC values were sufficiently taken into consideration. Aspects that were insufficiently taken into account concerned, in particular, fauna surveys, valuation of LNC elements and effects valuation. Moreover, LNC values were often restored or compensated for, rather than preserved. Large differences were found between individual river dike reinforcement projects. The method can also be applied in river dike reinforcement plans in other countries. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":306887,"journal":{"name":"Regulated Rivers-research & Management","volume":"2008 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129635902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Identification of gas supersaturation sources in the upper Colorado River, USA 美国科罗拉多河上游天然气过饱和源的识别

Regulated Rivers-research & Management Pub Date : 1999-07-01 DOI: 10.1002/(SICI)1099-1646(199907/08)15:4<301::AID-RRR521>3.0.CO;2-7

G. Schisler, E. Bergersen

{"title":"Identification of gas supersaturation sources in the upper Colorado River, USA","authors":"G. Schisler, E. Bergersen","doi":"10.1002/(SICI)1099-1646(199907/08)15:4<301::AID-RRR521>3.0.CO;2-7","DOIUrl":"https://doi.org/10.1002/(SICI)1099-1646(199907/08)15:4<301::AID-RRR521>3.0.CO;2-7","url":null,"abstract":"Atmospheric gas saturation levels were monitored throughout a 40-km reach of the upper Colorado River during the summer and fall of 1995 to identify possible sources of gas supersaturation in the river. Gas saturation data from seven fixed sampling points and 40 random sampling points were analyzed using analysis of variance (ANOVA) and multiple regression methods. The lowest total gas saturations (ΔP=−27) were found at the bottom release of Williams Fork Reservoir. The highest total gas saturations (ΔP=77) were found at the spillway release of Windy Gap Reservoir and the confluence of Willow Creek and the Colorado River. Spacial and temporal effects were determined to be significant contributors to gas saturation levels. Gas supersaturation in the study area originated from both man-made and natural sources. Water discharged from the spillway of Windy Gap Reservoir was found to be the main source of man-made supersaturation, while photosynthetic activity of aquatic plants was determined to be the natural source of supersaturation in the study area. Copyright © 1999 John Wiley & Sons, Ltd.","PeriodicalId":306887,"journal":{"name":"Regulated Rivers-research & Management","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123150939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6