/r/Hydrology

Photograph via snooOG

The Hydrology Reddit

Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability. A practitioner of hydrology is a hydrologist, working within the fields of earth or environmental science, physical geography, geology or civil and environmental engineering.

Domains of hydrology include hydrometeorology, surface hydrology, hydrogeology, drainage basin management and water quality, where water plays the central role. Oceanography and meteorology are not included because water is only one of many important aspects within those fields.

Hydrological research can inform environmental engineering, policy and planning. The term hydrology is from Greek: ὕδωρ, hydōr, "water"; and λόγος, logos, "study".

Wikipedia: hydrology


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/r/Hydrology

9,709 Subscribers

0

API for raw soil moisture data

Hey I’m kind of a big noob but I’ve been working on a project..

I’m looking for suggestions on getting soil moisture data for predicting river flow. The problem with SMAP was that it required getting a .h5 file which proved a too difficult to work with on mobile devices (swift/iOS).

Is there a free API that returns daily soil moisture data given a location & time? Ideally it returns the raw data, not a file.

Thanks for any suggestions!

1 Comment
2024/07/17
00:18 UTC

0

Water People! I need your help.

Tldr: What are my options for rezoning from AE to something better, and what are the costs?

Dear all - I've googled and googled and have come up short, so I'm now turning to you all for help.

I am looking at a mobile home park. Part of it is zoned AE and appears to be a Regulatory Floodway, ignoring the obvious flood risks. What are my options for getting this rezoned? What would you recommend as the most cost-effective option? Also, if you have a solution and want to do the work, im open to solicitations.

9 Comments
2024/07/16
23:08 UTC

1

Master’s Degree Programs

I’m looking to get a master’s degree in Hydrology. Could anyone point me to a school in the US that has offers one. I’ve only found a couple so far. Thank you for your help.

1 Comment
2024/07/16
15:54 UTC

1

Water inside a 60 cm pit ?

https://preview.redd.it/0zw4a4ectpcd1.png?width=1018&format=png&auto=webp&s=b89bf71410541d1d238c43f2c379e931c71b10a3

I had dug a 2ft/60 cm pit and water started to filling in bottom of the pit, I can see a small hole and sand particles moving . The top soil (60- 80cm) is red with gravel (filled on this land 10 yrs back) and below this layer we had black soil ( natural layer). Our area is almost a flat area with black soil all around. What might be reason for the water ingression?

5 Comments
2024/07/15
17:17 UTC

0

SMS raster issues

Hello, I’m working on a scour analysis in sms aquaveo, and the DEM (which comes in the form of a .tif file) is not loading in as a 3D object. Is that a problem with the software or with the file type? Thanks.

2 Comments
2024/07/12
16:40 UTC

2

HEC-HMS frequency storm function

Hello all. I want to create a model utilizing the frequency storm function in meteorologic model. It requires depths (mm) for 5mins, 15mins, 1 hour, 2 hours, etc. However, My RIDF data only has depths corresponding to 10mins, 20mins, 30 mins, 1 hour, etc.

Should I leave the 15min area blank? Or should I find the value for the 15mins? And can you recommend some methods to do so?

Thank you very much.

5 Comments
2024/07/10
15:03 UTC

3

Can someone please explain the difference between a Q-H curve of a crossection in a river and a QH curve of weir. How is the QH curve of the weir calculates?

Edit: *Calculated

  1. I want to know how the Q and H-Weir values are calculated in the pic below on MIKE 11.
  2. What is H-Pos and H-Neg
  3. Does anyone have a weir excel sheet calculation?

https://preview.redd.it/2glwbmbq8mbd1.png?width=1622&format=png&auto=webp&s=eb304aa3e8f2cb288e5c270fd8c48519cb88459f

Thanks in advance

2 Comments
2024/07/10
04:06 UTC

0

not hearing back from trout unlimited

applied to quite a few technician positions for trout unlimited but i haven’t heard back, even for a rejection. of the positions i’ve applied to i feel the most qualified for these. can anyone explain why this is happening? are these positions just really popular?

0 Comments
2024/07/10
02:02 UTC

2

Anyone familiar with Noncontact Meters?

Working on a project setting up ultrasonic flow meters on 24" pipe. When trying to program it, I'm encountering low signal strength problems. Cleaned them off and cleaned the area on the pipe with hopes of improving signal but no luck.

Have already looked over the settings to ensure everything is set correctly, as well as inspecting wiring again.

Does anyone have any experience with using these flow meters and can offer any advice on what it could be? Thanks.

2 Comments
2024/07/10
00:08 UTC

1

I've just heard of this job, and it sounds soooooo interesting!

How do I become one? I hear it requires a bachelor's degree. How many years do I have to study? I'm sure it'll be worth it.

7 Comments
2024/07/09
14:59 UTC

1

Floodway Data Table FIS

I’m currently reviewing a FEMA flood insurance study for a particular region. In the Floodway Data Table base flood water surface elevations are listed in 3 columns, “Regulatory”, “without Floodway”, and “with Floodway”. The “with Floodway” elevations match a HEC-RAS model I have been provided by FEMA (1d steady flow with flow data and a known water surface elevation at the reaches confluence with a larger river). What does with and without Floodway mean in this context? Are they saying they are obstructing the Floodway fringe and this is why the “with Floodway” is higher? Does it mean with Floodway obstructed? Does it have something to do with backwater effect?

Just trying to better understand these studies moving forward

4 Comments
2024/07/08
20:42 UTC

6

What happens if you follow a river upstream all the way to the end?

Does anyone have a picture of the start of a river (especially the kind that comes from mountains)? It makes sense when a river comes from a lake, what what do you mean streams on mountains come together to form a river? What happens if you follow those streams upstream all the way to the end??

34 Comments
2024/07/08
08:01 UTC

1

Pre/post development, flood study for a certain building site in NSW australia

Hi guys, I am new to flood study and analysis, I am trying to learn how to do flood analysis for buildings in Australia for pre and post development.
I use civil 3d to create surface tins for existing ground and proposed ground ( I create mainly four surfaces, existing and proposed site, neighboring buildings and tin from lidar data)
the I import these data into hec ras but I dont know how to continue form here.
My goal is to see if the ground level for the proposed building is flood affected or not
for example if the water level of the flood is 40 meters and the proposed building is 39 I have to raise it to 40 (plus a certain freeboard).

have anyone worked with flood analysis before that can assist me in learning HEC RAS.

I tried to learn it on my own with yt videos, but all I get is HEC RAS for rivers and dams and stuff like that.

can someone help or maybe suggest where can I learn this

5 Comments
2024/07/07
20:43 UTC

8

Can anyone share their knowledge or experience with obtaining and/or utilizing Professional Hydrology certification in their career?

My career has included work in storm water, drinking water, groundwater, and wastewater. Given my experience and interest in water resources, I am considering pursuing certification as a Professional Hydrologist through either the American Institute of Hydrology (AIH) or the State of Wisconsin. Can anyone speak to the value of this certification for an engineering career and/or any experiences with pursuing certification from either the AIH or WI?

7 Comments
2024/07/07
14:54 UTC

2

Finding maximum length of travel of water from a topo map

Topo map of my watershed.The red point is the outlet.

Kirpich equation

Hello everyone.Does anyone have any idea how to find the maximum length of travel of water in the watershed without using any software. Is comparing the length of flow from outlet to multiple trial points around the watershed boundary and selecting the maximum length the only option?

PS: I have googled it and got not relevant results.

6 Comments
2024/07/07
10:43 UTC

3

Good sources to review important hydrology topics

I recently graduated my Bachelor but I had study delay due to Covid, long story. So essentially it's been a hot minute since I passed water/hydrology courses and I will be doing Master's specializing in groundwater.

I'm going through old textbooks (though these often don't do the best job of explaining things) before the new Uni year starts and wish to supplement it with other sources. I found a dude on youtube that is covering a lot of hydrology topics, which is great. However, I was wondering if there are other sources out there?

Thanks in advance.

4 Comments
2024/07/07
07:27 UTC

4

Calibration in HEC-HMS/ Baseflow

Hello,

Can anyone please help me here. I do not understand why the simulated flow is always underestimated, I mean the base of flow touched the zero line. Also, the program generates baseflow in the initial time of the simulation but there is no baseflow for later time. I have used linear reservoir method and also tried recession method but could not get good results.

Loss: SCS curve Number
Transform : SCS Unit Hydrograph
Routing: Muskingham
Loss/Gain: Constant
Canopy: Simple
Storage: Simple
Snowmelt: Temperature Index

Please someone help here! Is there some more issues or is this just the baseflow.

https://preview.redd.it/mh2d9m9w41bd1.png?width=602&format=png&auto=webp&s=b72378b9ca442641d946ec3964c698e8f0cc263a

https://preview.redd.it/u7pohy9w41bd1.png?width=1877&format=png&auto=webp&s=760bd624e452a4f43594fd926acdeb5b355719aa

5 Comments
2024/07/07
05:05 UTC

2

Hi, anyone who has used aquacalc with Pygmy meter for water course discharge measurements? Will highly appreciate any help.

2 Comments
2024/07/03
08:09 UTC

1

Problem in ArcSWAT model when adding meteorological data definition

Does anyone know how to solve the problem? When I add the stations in the text box I get the following: ·

https://preview.redd.it/knyd0dsdq5ad1.png?width=379&format=png&auto=webp&s=24730bca1d79b089d2821b297f5095005b5483ab

"cannot define field more than once"

This is how I saved the stations in text format:

https://preview.redd.it/jni3cbnlq5ad1.png?width=782&format=png&auto=webp&s=7431d222c186e95e53528d4838019a10fb6288a2

Thanks in advance!

2 Comments
2024/07/02
19:32 UTC

1

How to combine signals from different sensors into a single, continuous time-series?

5 Comments
2024/07/01
14:02 UTC

1

Catchment Area

So, I am doing watershed delineation for catchment area for bridge. My question is what point I should select for finding catchment, bridge point or point just before river intersection?

https://preview.redd.it/ox9u1j1egw9d1.png?width=722&format=png&auto=webp&s=9203a3bac4fe44438384d6c78cd3a1fba0a9bf44

2 Comments
2024/07/01
12:18 UTC

3

Water policy and resource management (non engineering)

what are some good jobs or career paths in this field that you are personally aware of or experienced in? When i would google it, it mostly pulled up jobs on the engineering side. Thanks for the help :)

3 Comments
2024/06/30
18:25 UTC

12

What kind of job should I look for if I want to work with rivers?

I live next to the Kaw/Kansas River and I always loved the science and beauty of its muddy mess. Unfortunately there’s this company in my town that’s been polluting the water with its phosphorus wastewater. It’s technically legal for them to do this since their wastewater is under the legal amount for 2024, but in 2028 it won’t be. I want to maybe someday try to help protect it or at least work with the river in a non-environmental dangerous way. I really love geology so I think this would be a good focus. I don’t mind getting into engineering either

9 Comments
2024/06/30
14:38 UTC

4

Best use of self-directed professional development time?

Hello r/hydrology! Looking for career advice. I am a hydrologist (45F) with about 20 years' experience, mostly in land management and environmental consulting. As it turns out, I haven't had much practice in that time with HEC-RAS, although I am very interested in flood modeling and H&H. I did have some experience with it in grad school, but that's a while ago now.

Is it worth my time to self-study outside of work to get to, say, an intermediate level of fluency with RAS, or should I focus my efforts on other areas of equal interest, such as learning R or python? Maybe something completely different?

Thanks

Edit: goal is to add skills to expand career options and marketability

5 Comments
2024/06/30
03:50 UTC

5

Which under grad suits the field of hydrology best?

Water Resources or Environmental engineering. I have the option to do either and was wondering. The water resources program has a bunch of geology, hydrology, up to Calc 2, Environmental resource engineering is abet accredited with some elements tied into hydrology? Which would help me break into the field sooner? Suny Brockport water resources bs or Suny ESF Environmental resource engineering?

8 Comments
2024/06/29
01:47 UTC

3

Best cheapest way to find current topography maps?

Just starting to learn about permaculture and want to take an example property and practice design it to learn better. Trying to find usable topography maps for free or cheap to help identify water runoff and breaks in slope. I found some at ngmdb.usgs.gov but either it is next to impossible to find landmarks on these things that are still around today to even identify where you are looking OR i am MISSING something about how to use them :/ Please help! :)

18 Comments
2024/06/28
22:10 UTC

3

Over what distance would precipitation measurements be the same during a hurricane? (geography included in the description)

I need to determine whether roughly 20 minutes of torrential rainfall during hurricane Irene was the same in two different areas. One was Newark, NJ. The other was roughly 12 miles west of Newark.

To be concise, if it was raining extremely hard in Newark for 20 minutes during a hurricane, can we assume it was raining similarly hard 12 miles west (in NJ)?

Also, if anyone has advice on where I might be able to look for the answer, I would seriously appreciate it. I'm trying to help out a friend and can't figure this out.

7 Comments
2024/06/27
01:44 UTC

3

Land Dev Civil Eng. - Interested in the Hydrology

Hi all. Me and my father have a very small (me, him, and some subs) CE company focused on land development (the typical residentials and commercial). I started in construction and naturally worked myself up to working in an Engineering role. The thing is, I rarely do any real Engineering work, and my daily is more focused around running the business (conceptual layouts, proposals, meeting with clients/city/county, due-diligence, putting out fires). I realize that's where everyone eventually ends up, but that's where I started and currently where I still am. I do really like running the business and enjoy the aspects of land development, but I'm getting worn out due to the high level of stress, long hours (60-70 hrs), and lack of technical aspects. I absolutely hate doing conceptual layouts, as they require a level of creativity, and I have absolutely none. I'm a very analytical/technical person, and I enjoy having to think outside of the box or find more efficient ways to solve problems. If something doesn't necessarily require a formula to figure out, I'll still figure out a way to get excel to solve it for me. I've become one of the better large commercial septic designers in the DFW area, and that's the reason I love septic design so much - almost the entirety of it can be broken down into numbers and formulas.

I did a decent amount of programming in my early to mid 20's and absolutely loved it, and to this day I would say I probably should have switched to CS, but I didn't. At the time, I would say I was advanced-beginner to intermediate level. I did a full summer of learning web dev, game dev, etc. I also enjoy variability, having everyday be different and throwing new and unique challenges at me that I need to solve, it's what keeps me excited and engaged. It doesn't always have to be technical/analytical, I enjoy a mix of both. I also live pretty deep in the country, and being able to work from home is almost a must for me. Anyways, I started googling around seeing if there were any CE related jobs that I could hopefully relate my experience to that had elements of programming, modeling, analysis, etc. That's what led me here! Anyways, I'm 31 now, and I don't want to look back 20 years later and regret not moving to a different role, but this would be an absolutely massive change in my life and would take a while to set up. I'm just wanting to get y'alls opinions on if any of my experience applies, my realistic chances of moving into the field, if my interests really do apply here, etc. Appreciate any opinions y'all may have.

5 Comments
2024/06/26
13:45 UTC

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