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1 edition of Estimating streamflow from concurrent discharge measurements found in the catalog.

Estimating streamflow from concurrent discharge measurements

H. W. Lowham

Estimating streamflow from concurrent discharge measurements

by H. W. Lowham

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  • 29 Currently reading

Published by Lowham Engineering in Lander, Wyo .
Written in English

    Subjects:
  • Stream measurements

  • Edition Notes

    Statementprepared for Wyoming Water Development Commission by Hugh Lowham ... [et al.].
    ContributionsWyoming Water Development Commission, Lowham Engineering LLC
    Classifications
    LC ClassificationsGB1225.W8 E88 2009
    The Physical Object
    Paginationiv, 26 leaves :
    Number of Pages26
    ID Numbers
    Open LibraryOL24805250M
    LC Control Number2010368119

    [2] The discharge measurement at any river gauging site plays a vital role in comprehensive and coordinated plan-ning for the utilization of water resources of river basins. Barring a few exceptional cases, continuous measurement of stream discharge is difficult to obtain. Further, direct measurement of discharge is a time consuming and costly. 1 day ago  ENGINEERING HYDROLOGY 1- The velocity measurement data for a certain streamflow measuring station is as tabulated: d d Rev. Time Rev. Time Rev. Time # (sec) # (sec) # (sec) 4 44 Distance from left bank (m) 0 2 4 8 12 16 20 23 25 28 32 36 40 44 Depth d' (m) 0 0,8 34 34 34 34 44 54 64 54 44 34 34 34 14 .

    Discharge measurements made at the eight sites near midmonth each month during were used to estimate monthly mean flows at the sites for that period. These measurements also were correlated with concurrent daily mean flows from eight operating gaging stations. The USGS has operated a surface-water monitoring network on Long since the early ’s. This network of USGS stream and lake monitoring stations provides data to support hydrologic-related issues such as water-supply management, flood and drought monitoring, urban-development and resiliency planning, bridge, road, and culvert design, landuse and climate change studies, .

    of the annual SSQ is transported during infrequent high-streamflow events. Suspended particle sizes range from clay to sand; material is commonly 50–80% fines (i.e., discharge at the station is m3/s (water years. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle .


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Estimating streamflow from concurrent discharge measurements by H. W. Lowham Download PDF EPUB FB2

The discharge measurement—obtaining periodic measurements of discharge (the quantity of water passing a location along a stream) 3.

The stage-discharge relation —defining the natural but often changing relation between the stage and discharge; using the stage-discharge relation to convert the continuously measured stage into estimates of. Estimating Monthly Flows from Discharge Measurements The concurrent measurement method is generally used to estimate monthly flows.

Measurements are made on the ungaged stream near the middle of the month to obtain estimates of the monthly flows. Streamgages do not measure streamflow directly. Rather, streamflow monitoring involves several steps, which generally include (1) continuously measuring and recording the stage of a stream, (2) periodically taking discharge measurements in the stream, (3) developing the relation between stage and discharge for the site and applying this relation to the continuous.

Streamflow measurements are commonly based on water level measurements that are converted to a discharge rate using a rating curve (see Fig. ).The rating curve is constructed based on a sample of streamflows measured using the (time-consuming) velocity–area method and their corresponding water level (concurrent streamflow and water level data sample is.

Discharge measurements must be made for at least three different water surface elevations: low flow, median flow, and high flow.

The section that is measured should be accessible at all water surface elevations and discharges to be measured. Choose a straight reach of stream where flows are relatively by: Monthly streamflow records from gaging stations with more than 5 years of record were extended to a year base period,using a mixed- station, record-extension model.

Monthly streamflow characteristics were computed from the extended record. Four statistical methods--basin characteristics, active-channel width, concurrent measurement, and weighted average were used to estimate. The estimated bias limits from these data sets should have accounted for most, if not all, unknown and unknowable bias errors encountered in these measurements.

The results from this study may be used to determine a nominal bias limit for moving-boat ADCP discharge measurements. Methods for Estimating Monthly Streamflow Characteristics at Ungaged Sites in Western Montana For sale by the Books and Open-File Reports Section, U.S.

Geological Survey, Federal Center, BoxDenver, CO Concurrent-Measurement Method 8 Weighted-Average Estimate Slope, and Discharge 5 3. The Use of Surface Slope in Determining Flow 7 4. Correcting for Unsteady Effects in Obtaining Discharge from Stage 13 5.

Hydraulic Derivation of Rating Curves 21 6. Representation, Approximation and Calculation of Rating Curves 25 7. Conclusions and Implications for Management 39 8. References 41 Appendix A. discharge permits to dischargers to streams and for limiting withdrawals of water from streams.

This report presents techniques for estimating the 7Q10 for ungaged sites on streams in Mississippi based on the availability of base- flow discharge measurements at the site, location of nearby gaged sites on the. Low streamflow estimates are required for a variety of water resource management purposes.

When a historic streamflow record is available, low streamflow estimates may be obtained by a parametric or nonparametric frequency analysis. When no historic discharge is available, techniques for estimating low streamflow statistics are limited. For most application, regional.

In a more recent study, Mohamoud () attempted to predict daily streamflow in the Appalachian region by sequencing constructed FDCs with streamflow at a gaged reference site. In this study Mohamoud compared flow values predicted from his FDC method, and from various forms of the area ratio method, to the actual flow values in the study streams.

the discharge measurements from 8 of the ungaged sites and discharge from 5 streamflow-gaging stations with fewer than 5 years of record with discharge data from streamflow-gaging stations with extended records.

Relations between dis­ charge at three of the ungaged sites and the monthly streamflow data at nearby gages could not. Low-flow measurements at 63 partial-record and miscellaneous streamflow-measurement sites during surveys in –09 are used with concurrent flows at continuous streamflow-gaging stations (index sites) within the U.S.

Geological Survey network to estimate the low-flow metric Q 7,10 at each measurement site (Q 7,10 is defined as the lowest. The New York Streamflow Estimation Tool uses data from the U.S. Geological Survey streamflow network for selected streamgages in New York (excluding Long Island) and surrounding States with shared hydrologic boundaries, and physical and climate basin characteristics to estimate the natural unaltered streamflow at ungaged stream locations.

1. Introduction. Streamflow is the volumetric discharge expressed in volume per unit time (typically cubic feet per second (ft 3 /s) or cubic meters per second (m 3 /s)) that takes place in a stream or channel and varies in time and space. Excess streamflow can create a flooding hazard, and although excess streamflow is a natural occurrence and healthy for the.

Our analytical approach uses discrete water-quality samples, daily streamflow data, and a statistical model to estimate a water-quality trend and the two components of change for each site by controlling for various aspects of streamflow variability (Choquette et al., in press; Hirsch et al., a).

Instead of first identifying sites with. Estimating Discharge Measurement Uncertainty Using the Interpolated Variance Estimator Journal of Hydraulic Engineering October Methodology for Estimating ADCP Measurement Uncertainty in Open-Channel Flows.

Once-monthly streamflow measurements were used to estimate selected percentile discharges on flow-duration curves of monthly mean discharge for 40 ungaged stream sites in the upper Yellowstone River basin in Montana. The estimation technique was a modification of the concurrent-discharge method previously described and used by H.C.

Riggs to estimate annual mean discharge. For this study, 85 low-flow discharge measurements made at the 17 ungaged sites were used in conjunction with continuous-record discharge data from 10 USGS streamflow-gaging stations to estimate the 7Q2 for the ungaged sites.

Estimation of Minimum 7-Day, 2-Year Discharge. Streamflow measurements at 14 low-flow partial-record stations and two discontinued streamflow-gaging stations were related to concurrent streamflows at six long-term streamflow-gaging stations to estimate streamflows at selected flow durations from 50 to 99 percent for water years At low flows, stream discharge per square mile.This paper presents an alternative method for estimating discharge measurement uncertainty that uses statistical techniques and on-site observations.

This interpolated variance estimator (IVE) estimates uncertainty based on the data collected during the streamflow measurement and therefore reflects the conditions encountered at the site.The culvert allows Big Noise Creek to flow under Route This creek does not have a streamflow gage.

Objectives: For purposes of illustration, determine peak discharge values for the stream to identify the culvert design flow that could be used to size the culvert. Determine the range of culvert discharges and their seasonal values that.