Download or read book Estimation of flow duration curves for use in hydropower development for ungauged or partially gauged subbasins in the Kabul River basin Afghanistan written by Muhammad Tariq Nasery and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow duration Curves written by James Kincheon Searcy and published by . This book was released on 1959 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Duration Curve Prediction for Ungauged Basins written by and published by . This book was released on 2016 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flow duration curve (FDC) is one of the most widely used tools for displaying streamflow data, and percentile flows derived from the FDC provide essential information for managing rivers. These statistics are generally not available since most basins are ungauged. Percentile flows are frequently predicted using regression models developed using streamflow and ancillary data from gauged basins. Many potential independent variables are now available to predict percentile flows due to the ready availability of spatially distributed physical and climatic data for basins. A subset of the variables is often selected using automated regression procedures, but these procedures only evaluate a portion of the possible variable combinations. Other approaches for exploiting the information from physical and climatic data may produce stronger models for predicting percentile flows. The overarching hypothesis guiding this dissertation research was that more extensive approaches for extracting information from large sets of independent variables may improve percentile flow predictions. The dissertation was organized into the following three linked studies: (1) a performance evaluation of various approaches for selecting the independent variables of percentile flow regression models, (2) a comparison of different sets of variables for percentile flow regression modeling with increasing amounts of information in terms of the number of variables and their description of the statistical distribution of the data, and (3) a proof-of-concept study using a neural network approach called the self-organizing map (SOM) to account for the noise and non-linearity of predictive relations between the independent variables and percentile flows. Key findings from these studies were as follows: (1) random forests was the best approach for selecting the independent variables for regression models used to predict percentile flows, but variables selected based on a conceptual understanding of the FDC performed nearly as well, (2) a set of only three variables (mean annual precipitation, potential evapotranspiration, and baseflow index) performed as well as models with larger sets of variables representing more physical and climatic information, and (3) the SOM performed similarly to global regression models based on all the basins, but did not outperform regression models developed for regions composed of similar basins. This may be due to the SOM using all the independent variables, whereas the regression models discarded irrelevant variables that could increase the error in percentile flow predictions. All the studies of this dissertation were performed using 918 basins in the contiguous US, and the resulting predictive models provide a tool for local watershed managers to predict 13 percentile flows along with an estimate of the predictive error. These models could be improved through future research that (1) emphasizes the role of geology as this provided the most valuable information for predicting the percentile flows, (2) exploits new sources of remotely sensed information as classic topographic variables provided little predictive information, and (3) develops specialized models designed for high and low flows as these were the most difficult to predict.
Download or read book Prediction of Flow Duration Curves for Use in Hydropower Analysis at Ungaged Sites in Pohnpei FSM written by L. F. Heitz and published by . This book was released on 2010 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Flow Duration Curves at Ungaged Reaches in New Hampshire and Vermont written by John Laurence Kelliher and published by . This book was released on 2001 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations of Flow duration Curves and Application to Estimating Discharge on Ungauged Streams written by Scott Joseph Bighinatti and published by . This book was released on 2005 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Synthetic Weekly Flow Duration Curves and Annual Streamflow Hydrographs at Ungaged Sites in the Russian River Watershed Using the Dimensionless Flow Duration Approach written by Edwin K. Yu and published by . This book was released on 1996 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methodologies for the Determination of Flow Duration Curves at Specific Sites on Ungaged Reaches of Streams written by Rickey L. Emmert and published by . This book was released on 1979 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Peak Flow Frequencies for Natural Ungaged Watersheds written by Water Resources Council (U.S.). Hydrology Committee and published by . This book was released on 1981 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Indus Basin of Pakistan written by Winston H. Yu and published by World Bank Publications. This book was released on 2013 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study, Indus basin of Pakistan: the impacts of climate risks on water and agriculture was undertaken at a pivotal time in the region. The weak summer monsoon in 2009 created drought conditions throughout the country. This followed an already tenuous situation for many rural households faced with high fuel and fertilizer costs and the impacts of rising global food prices. Then catastrophic monsoon flooding in 2010 affected over 20 million people, devastating their housing, infrastructure, and crops. Damages from this single flood event were estimated at US dollar 10 billion, half of which were losses in the agriculture sector. Notwithstanding the debate as to whether these observed extremes are evidence of climate change, an investigation is needed regarding the extent to which the country is resilient to these shocks. It is thus timely, if not critical, to focus on climate risks for water, agriculture, and food security in the Indus basin of Pakistan.
Download or read book Flow duration Curves written by James Kincheon Searcy and published by . This book was released on 1959 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weekly Flow Duration Curves and Observed and Filled Weekly Flows for the Susitna River Basin written by HARZA-EBASCO Susitna Joint Venture and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow duration curves derived for natural and with-project (Susitna Hydroelectric Project) conditions for the Susitna River, Alaska.
Download or read book Duration Curves and Low flow Frequency Curves of Streamflow in the Susquehanna River Basin New York written by Oliver P. Hunt and published by . This book was released on 1967 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Application of Flow Duration Curves for Stream Restoration written by S. Kyle McKay and published by . This book was released on 2016 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Regional Flow duration Curves for Indiana and Illinois written by Thomas M. Over and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Duration Curves for Natural and With project Conditions written by and published by . This book was released on 1984 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow duration curves for the Susitna River at Gold Creek, Sunshine, and Susitna stations were derived for natural conditions and projected conditions after construction of the proposed Susitna Hydroelectric Project. Observed weekly flows are given for the Chulitna and Talkeetna rivers near Talkeetna and the Skwentna River near Skwentna.
Download or read book Low Flow Studies written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
