WEBVTT Kind: captions Language: en 00:00:08.500 --> 00:00:13.770 Hi, my name is Laura Flight and I am a Hydrologic Technician in the Augusta, Maine Office. 00:00:13.770 --> 00:00:18.050 This screencast video will show how to do a midsection discharge measurement in SWAMI 00:00:18.050 --> 00:00:23.080 with a mechanical current meter, such as a Price AA or pygmy meter. 00:00:23.080 --> 00:00:26.990 From the "Site Visit Tasks" screen select the "Discharge Measurement" button in the 00:00:26.990 --> 00:00:31.020 task list. 00:00:31.020 --> 00:00:34.750 Next select "New Channel." 00:00:34.750 --> 00:00:39.220 Give the channel a relevant name, such as "main", or "left" or "right" by typing in 00:00:39.220 --> 00:00:42.940 the field next to "Name." 00:00:42.940 --> 00:00:47.800 This is especially important if you will be doing a multi-channel measurement. 00:00:47.800 --> 00:00:55.309 From the pick-list next to "Qm Method" select "Midsection" for this midsection measurement 00:00:55.309 --> 00:00:57.610 method. 00:00:57.610 --> 00:01:02.800 Once the midsection method is selected, other measurement properties appear. 00:01:02.800 --> 00:01:07.850 Under "Deployment Method", select how the midsection measurement is going to be made. 00:01:07.850 --> 00:01:13.850 In this case, let's do a wading measurement. 00:01:13.850 --> 00:01:17.770 Then select the "Velocity Method" from the pick-list. 00:01:17.770 --> 00:01:22.020 In this screen cast video, we are covering AA or pygmy meters so let's choose a Price 00:01:22.020 --> 00:01:28.170 AA velocity method. 00:01:28.170 --> 00:01:32.659 From the next pick-list for "Meter", I will select the serial number of the AA meter I 00:01:32.659 --> 00:01:33.780 am using. 00:01:33.780 --> 00:01:37.490 This list comes from SiteVisit and should be specific to your Water Science Center or 00:01:37.490 --> 00:01:42.350 Field Office. 00:01:42.350 --> 00:01:47.570 From the "Suspension" pick-list, select "Top-setting wading rod" for the USGS top setting wading 00:01:47.570 --> 00:01:51.380 rod. 00:01:51.380 --> 00:01:53.710 To proceed, we must inspect our meter. 00:01:53.710 --> 00:01:58.950 If a spin test is not done, you must indicate that you have inspected your meter by selecting 00:01:58.950 --> 00:02:06.200 the check box next to "Meter Inspected" to continue. 00:02:06.200 --> 00:02:09.450 Select "Measure" to start recording mid-section measurement information. 00:02:09.450 --> 00:02:14.990 It is recommended that this not be selected until you are actually ready to measure (have 00:02:14.990 --> 00:02:19.599 your tagline strung, meter gear assembled) as this will later be tagged as the measurement's 00:02:19.599 --> 00:02:23.060 start time. 00:02:23.060 --> 00:02:28.349 From the "Midsection Measurement" screen, select "New Section" in the upper right. 00:02:28.349 --> 00:02:33.180 The next screen is where information for each individual vertical observation of this midsection 00:02:33.180 --> 00:02:34.599 measurement will be added. 00:02:34.599 --> 00:02:40.160 We will start with the "Distance" box, where we will enter our edge distance on the tagline 00:02:40.160 --> 00:02:44.390 for our first section. 00:02:44.390 --> 00:02:48.040 Enter the total depth, which often on the edge is 0. 00:02:48.040 --> 00:02:52.840 When this is the case, the revolutions and time at the 0.6 depth will be automatically 00:02:52.840 --> 00:02:56.700 be populated at 0 and 40. 00:02:56.700 --> 00:03:02.990 Then select "Done" as we have finished entering information for our first vertical. 00:03:02.990 --> 00:03:07.250 Back at the "Midsection Measurement" screen, select "New Section" to enter information 00:03:07.250 --> 00:03:17.819 about the next vertical, starting with the distance and total depth. 00:03:17.819 --> 00:03:24.240 The width will be calculated automatically based on the defined section distances. 00:03:24.240 --> 00:03:28.129 After a few sections if you are doing even or patterned stationing between verticals, 00:03:28.129 --> 00:03:31.480 SWAMI will recognize this and auto-populate the distance. 00:03:31.480 --> 00:03:35.739 However, it can always be changed and should be if the amount of discharge being measured 00:03:35.739 --> 00:03:41.650 in each section is changing in order to adequately profile the cross section. 00:03:41.650 --> 00:03:48.310 In this section, we have a depth of 1.52 feet and since we are using a AA meter, the 0.6 00:03:48.310 --> 00:03:53.489 velocity observation row in the middle of the screen is highlighted green indicating 00:03:53.489 --> 00:03:59.100 we should take our velocity measurement at 0.6 of the total depth. 00:03:59.100 --> 00:04:05.519 Next to the 0.6 is the "Rod Set" column; this is the position you set a USGS wading rod 00:04:05.519 --> 00:04:11.790 using the scale on the handle so that the meter is at 0.6 of the depth. 00:04:11.790 --> 00:04:17.459 After taking your velocity observation with the AA meter, in the 0.6 row enter the total 00:04:17.459 --> 00:04:29.780 counts in the "Rev" box and the amount of time in the "Time" box. 00:04:29.780 --> 00:04:33.550 Velocity information will now be populated in SWAMI. 00:04:33.550 --> 00:04:38.610 Note: You do not need to stop on a "defined" count such as those listed on the meter rating 00:04:38.610 --> 00:04:45.220 tables (7, 10, 15, 20 etc.); SWAMI will calculate the velocity based on the meter equation. 00:04:45.220 --> 00:04:51.880 Hit "Done" when you have completed this measurement section or vertical. 00:04:51.880 --> 00:04:56.200 You will notice that each time you are finished adding a section you return to the "Midsection 00:04:56.200 --> 00:05:00.139 Measurement" screen where you can review the data you have collected so far. 00:05:00.139 --> 00:05:11.160 I will add another section and enter the distance and total depth. 00:05:11.160 --> 00:05:18.900 At this section our total depth is 2.65 feet, so now the 0.2 and 0.8 velocity locations 00:05:18.900 --> 00:05:25.110 are highlighted since we are using a AA meter and the depth is greater than 2.50 feet. 00:05:25.110 --> 00:05:30.210 Measure the velocity for the 0.2 and 0.8 depths (the order does not matter) and enter the 00:05:30.210 --> 00:05:38.010 values after each. 00:05:38.010 --> 00:05:43.290 You can also add a 0.6 reading if desired; SWAMI will calculate the average velocity 00:05:43.290 --> 00:05:44.960 appropriately. 00:05:44.960 --> 00:05:50.110 In addition, SWAMI will warn you if "an irregular velocity profile is indicated" and suggest 00:05:50.110 --> 00:05:53.460 a 0.6 reading be obtained. 00:05:53.460 --> 00:05:58.150 Select done when you are done with that vertical. 00:05:58.150 --> 00:06:00.610 Let's go to the next section. 00:06:00.610 --> 00:06:03.740 At this section we have an angle to our flow. 00:06:03.740 --> 00:06:10.759 To add this, in the box in the upper left under "Coef/%" where it lists "1.00", enter 00:06:10.759 --> 00:06:23.330 the angle coefficient such as 0.99. 00:06:23.330 --> 00:06:25.610 Select done when finished. 00:06:25.610 --> 00:06:30.940 I will again add another section. 00:06:30.940 --> 00:06:34.210 Let's say we have finished our measurement at the opposite edge and there is vertical 00:06:34.210 --> 00:06:41.199 wall that does not have a depth of zero. 00:06:41.199 --> 00:06:52.960 Enter the depth, then in the "Coef/%" box, type the % of the velocity of the previous 00:06:52.960 --> 00:06:58.160 section to be used as the velocity for this edge section. 00:06:58.160 --> 00:07:03.590 For instance, enter 25% if the velocity at the edge section is estimated to be 25% of 00:07:03.590 --> 00:07:12.110 the velocity measured in the previous section. 00:07:12.110 --> 00:07:19.090 Then in the upper left under "Pier/Est" select "EstP" to estimate the velocity based on the 00:07:19.090 --> 00:07:21.920 "P"revious section. 00:07:21.920 --> 00:07:27.300 "EstN" would estimate based on the "N"ext section. 00:07:27.300 --> 00:07:31.400 "EstM" is for a "M"anual estimate. 00:07:31.400 --> 00:07:34.040 Then select done. 00:07:34.040 --> 00:07:44.979 Overall, here are some other things to point out about the vertical or section entry form. 00:07:44.979 --> 00:07:50.240 If you click the "Note" button near the upper right, you can add a text comment such as 00:07:50.240 --> 00:07:55.350 "rock upstream in section" or "pivot slipped" that will be tagged with that section. 00:07:55.350 --> 00:07:58.860 This feature currently only works on a PDA. 00:07:58.860 --> 00:08:04.449 Above the "Note" in the upper right of this screen, SWAMI cycles through the battery status 00:08:04.449 --> 00:08:13.230 of the device you are using (if known), the discharge calculated in the previous section 00:08:13.230 --> 00:08:18.750 (to help you stay under 5% in each section), the number of sections you have taken so far 00:08:18.750 --> 00:08:24.440 in the measurement, and the distance along the tagline of your previous section. 00:08:24.440 --> 00:08:31.990 This is helpful information as you make a discharge measurement. 00:08:31.990 --> 00:08:36.669 To insert a section or vertical, at the "Midsection Measurement" screen that lists the sections 00:08:36.669 --> 00:08:45.240 taken, right click on a row then select "insert before" to insert a vertical prior to the 00:08:45.240 --> 00:08:53.680 selected one, or "insert after" to insert a section subsequent to the selected one. 00:08:53.680 --> 00:09:01.190 Then enter the distance, depth, and velocity as appropriate. 00:09:01.190 --> 00:09:05.870 To delete a section or vertical, at the "Midsection Measurement" screen that lists the sections 00:09:05.870 --> 00:09:12.500 taken, right click on the row to be deleted, and select "Delete." 00:09:12.500 --> 00:09:21.980 A warning box pops up to ensure the desired action is to delete this section. 00:09:21.980 --> 00:09:26.250 To edit a section or vertical, at the "Midsection Measurement" screen that lists the sections 00:09:26.250 --> 00:09:36.279 taken, right click on the row to be edited, and select "Edit." 00:09:36.279 --> 00:09:39.610 The information for that vertical is now displayed. 00:09:39.610 --> 00:09:45.000 Type in any of the entry boxes to make an edit. 00:09:45.000 --> 00:09:50.950 Then select "Done." 00:09:50.950 --> 00:09:54.650 Although the time for each vertical is not displayed at the "Midsection Measurement" 00:09:54.650 --> 00:09:59.700 screen, it is displayed when the SWAMI file is displayed with a style sheet. 00:09:59.700 --> 00:10:06.010 An edited section will be time tagged with the time of the edit. 00:10:06.010 --> 00:10:10.250 We have now finished taking verticals for our midsection discharge measurement. 00:10:10.250 --> 00:10:13.959 At the "Midsection Measurement" screen, you will notice summary information here such 00:10:13.959 --> 00:10:22.459 as the total number of sections, average velocity, total width, total area, and total discharge. 00:10:22.459 --> 00:10:25.970 Since we are done with our measurement, I will select "Done." 00:10:25.970 --> 00:10:36.870 A dialogue box asks you if you are sure, select Yes. 00:10:36.870 --> 00:10:41.380 If you have questions on the process of performing a mid-section Price AA or pygmy measurement 00:10:41.380 --> 00:10:47.160 in SWAMI, please contact the SWAMI help group at the e-mail address shown, or visit the 00:10:47.160 --> 00:10:49.010 FCIS website at the address shown.