/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

8,701 Subscribers

2

CU Boulder Hydrology

Hi!

I am looking to apply for graduate school this coming fall (MS, with the possibility of PhD down the line) for hydrology, specifically using modeling tools to assess the impact of climate change on water resources. I know that might be a broad topic, but I'm hoping an MS will allow me to narrow my interests a bit.

I live in the Boulder area, and I found CU Boulder's Hydrology, Water Resources, and EFM subtrack within the Civil Engineering department. There are some PIs that really appeal to me in terms of research fit. I am wondering what the reputation of this program is? I would love to stay in the Boulder area if it works out.

2 Comments
2024/03/28
16:39 UTC

1

PROBLEM Viewing Background Aerial in HEC-HMS Basin Model. I have attempted to add a background image to my HMS model through the 'Map Layers' editor. It is not then showing in the Basin Model Map. I have tried everything I could find in the manuals and tutorials including alternative image types

(Continued) and file size and resolution. I have also tried HEC-HMS v-4.11 and v-4.12 Beta. Any suggestions?

https://preview.redd.it/uabae1zri3rc1.jpg?width=1082&format=pjpg&auto=webp&s=40b91374ab2ea7b6e110c45b17a20ac3fbf061b3

0 Comments
2024/03/28
15:54 UTC

1

Can anyone help me find the Newfoundland and Labrador Digital Water Well Database? I’m not sure if it still exists online.

Can anyone help me find the Newfoundland and Labrador Digital Water Well Database? I’m not sure if it still exists online.

I’m familiar with the NL Water Resources Map and the Groundwater Information Network but haven’t found the water well database. Specifically I’m looking for average groundwater levels in the area of Manuels, Conception Bay South, NL

0 Comments
2024/03/28
15:04 UTC

8

Visualizing how rivers deposit sand and silt into body's of water

4 Comments
2024/03/28
14:14 UTC

1

East Coast US Coastal/Estuary Resources

Hi! I am a recent PhD graduate who focused on coastal oceanography and hydrology (estuaries etc) in California. I just finished up my dissertation and am imminently moving to the north east US to be able to support family members. I feel out of my depth/uncalibrated though with east coast systems! Does anyone have any resources such as courses or textbooks that are largely contextualized in the east coast so I can recalibrate and brush up? Thank you!

0 Comments
2024/03/27
20:16 UTC

4

Looking for recommendations for HEC-RAS tutorials for beginners? (+ HEC-HMS, ArcGIS)

I was wondering if anyone can recommend a good comprehensive resource to learn HEC-RAS? I found a few playlists on youtube, but im wondering which ones are best for beginners learning the basics. I had an introduction to it in university but it was almost 10 years ago.

Also looking for recommendations for HEC-HMS and ArcGIS.

Thanks.

5 Comments
2024/03/27
17:22 UTC

6

Help in practical uses of python in hydrology

I have experience in autocad\civil3D for civil works drawings and I am in the process of making a transition to hydrology. I would like to know:

  1. Practical examples of how python can help me work more efficiently
  2. If python is worth learning
3 Comments
2024/03/25
23:27 UTC

2

Help in obtaining runoff volume and peak discharge value from HEC-HMS model

Hello everyone, I am trying to create a simple model using the HEC-HMS to obtain the value of runoff volume and peak discharge for a river basin. The problem is I do not know which method (transform, loss, routing, baseflow, type of precipitation) should I utilize. Please suggest a suitable and simple model to run in HEC-HMS to get my desired data. Currently, the data that I have are precipitation data, stream flow data, terrain data, curve number, and LULC data.

2 Comments
2024/03/24
04:53 UTC

2

What can suffer be useful for?

I currently just use it for groundwater elevation contouring and iso-concentration maps for groundwater plumes. It seems super versatile though and I’m curious what others are using it for.

2 Comments
2024/03/24
04:07 UTC

19

Help with floodplain map

I am looking to buy a house in LA Crosse, Wisconsin. There is a house I really like that is right next to a weird boundaried floodplain on FEMA's website. It is pretty far away from the Mississippi River, but is near some bluffs which could have run off from storms. Should I be really worried about the location? What questions should I ask and to whom? The pin in the attached pictuee is the house I am looking at. Thanks!

26 Comments
2024/03/22
17:02 UTC

1

research gap

I am interested in doing an undergrad research about evaluation of groundwater recharge for a certain area. Can you help how to pinpoint gaps in this field of study Or what are the typical gaps in this kind of research. Any help or suggestion is highly appreciated.

4 Comments
2024/03/22
16:43 UTC

4

HEC-RAS 1D modelling trouble

Hello everyone

For a Project, I'm using HEC-RAS 1D to model a little stream through a town. We are talking around 600m in length, bed width of 2m and height of around 1.35-1.5m fully built out of concrete and stone, nothing natural. The Simulation works well for a steady case where we put Q=5m^(3)/s (see attached picture), but for the unsteady case, it does not work, as the Energy line explodes thousands of meters into space and the water level is shown in little triangular pieces. For the unsteady, we put a flow hydrograph with the constant value of 5m^(3)/s over two hours to recreate the conditions of the steady flow case. We looked at Courant number (for time steps), spacing of cross sections, Manning values... but the results always looks the same. From the fact, that the steady flow case works I assume the geometry makes sense. We also deleted all the bridges to get rid of an other possible error. So the problem should be somewhere in the Simulation of the unsteady case I assume. But there I played around with all the values but nothing changed. Does anyone have an idea how to fix this? I am very new to HEC-RAS modelling, the supervisors could also not figure it out yet, I did not find an answer by googling and with the help of chatGpt.

Any help and hint is appreciated

Thanks

steady case Q=5m3/s

unsteady case Q=5m3/s

5 Comments
2024/03/22
15:47 UTC

3

ELI5 - What is the use of EPASWMM for land development

As the title says, im really confused and dont really know how to use it.

2 Comments
2024/03/21
03:17 UTC

0

Artificial intelligence in HEC-RAS

Hello everyone, Im wondering if you anyone of you have the chance to think or to use the AI in hec ras for automating some processes. Even that hec ras is not an open source software. If you got any idea about this please share it here SOS 🔺

12 Comments
2024/03/20
20:20 UTC

2

General Question - Bringing in work.

Hey Everyone!

I've got a question for you and am looking for some career advice. I'm currently a 2 year PE. I have worked for the same company my entire career. During my time as an EIT/PE, I've primarily worked in watershed analysis/drainage design for a large open pit mine. Prior to me, we really didn't have a hydrologist in the team and had to pull experience from other branches of the company. I dedicated the time and grew the team allowing for a lot of the drainage/hydrology work to come in for our team. I even have an EIT under me now learning the field. However, the work still consists of working for the mine. I'd like to grow my team and bring in work from other sources. Do you have some resources where you look to get government work (e.g. Forest Service, USDA, BLM, National Parks Service etc...)? Such as finding Requests For Proposals or Studies from these organizations that you have used? What advice would you give for someone trying to get work and contribute to the income of the company?

Let me know your thoughts and thank you for taking the time to read this. :)

2 Comments
2024/03/20
20:14 UTC

1

Reputation of New Mexico Tech in the field of Hydrology

I will prolly join NMT's Earth Science(Still haven't got the offer letter tho) department for NMT this August for grad school. I am well aware that NMT is well known for Earth Science stuff. I am an international student, so I would like to know if employers in US would hire an international student. I would love to work for the government and I would prefer the national labs but I guess most have US citizenship as the requirement. How hard it would be to get hired as a foreign national?

4 Comments
2024/03/20
12:49 UTC

2

Type 1A Storm - Proportions

This might be a stupid question, but where would I go to find the proportions of total rainfall values for a Type 1A storm? I usually model using a standardised 24hr nested storm, with peak at 12hr mark, but a new project requires Type 1A storm, and I need the proportion values to make my hyteograph.

2 Comments
2024/03/19
15:47 UTC

0

General Physics vs Calc Based physics grad school prereqs

Would taking general physics significantly hurt your application to grad school versus taking calc based physics? Some grad schools i’m looking at don’t specify which physics you need as pre requisites.

4 Comments
2024/03/18
22:29 UTC

5

Python and R SDK for replicating hydrology papers

I'm working on replicating a few papers that I find interesting and I'm thinking about putting them behind a Python and R SDK for others to access.

Ideally, you can just pass the name of the paper to the SDK and it can reproduce the analysis and figures on a particular dataset within a Jupyter Notebook or R studio.

Here's a example of what I'm thinking about making: https://github.com/Osyris-Tech/Assessing-the-Impact-of-Land-Use-and-Climate-Change-on-Surface-Runoff/blob/main/README.md

Thoughts/ideas on this?

I'm also taking requests for papers anyone wants replicated.

0 Comments
2024/03/16
22:08 UTC

5

Online Intro Hydrology Course (applied - for environmental consultants)?

Anyone know of any short-term online courses or workshops on surface water hydrology?

-e.g. catchments, surface water flow concepts and modeling in GIS?

I am an environmental consultant specializing in wetlands looking for some professional development. I can't seem to find anything relevant/suitable that isn't an entire college degree.

6 Comments
2024/03/15
17:12 UTC

1

HECRAS Unsteady Flow analysis error

Hi! I'm using HEC RAS for an assignment and I've been trying to do a 1D unsteady flow analysis. However, when I look at the results, I keep getting a map where the flood extents are the same everywhere. I don't think this is what I should be getting. I would be grateful for any advice :)

2 Comments
2024/03/15
16:03 UTC

2

Find a paper

Hi redditors,

I know this is a really long shot but I really don't know what else I can do.

I'm tring to find a published paper about groundwater discharge that I read a long time ago, there's some content in that paper I'd like to revisit, however I cannot find this paper. I've tried revisiting all the paper I read but still no luck. I wonder some researchers here might've read it and could provide some information to me.

I can't remeber the exact words I was looking for, but basically it mentioned something like ''damming the surface river water could enhance the subsurface groundwater discharge into the coastal zone, due to someting about pressure'. Sorry I know it's vague but that's all I can remember.

Has anyone ever read something like this? or something similar? any help would be much appreciated!

4 Comments
2024/03/15
15:10 UTC

3

Graduate programs

I am interested in potentially becoming a water resource specialist. What is the difference between the grad program of hydrologic sciences at UNR and the water resources management program at UNLV? I’m aware that networking plays a huge role in the job you eventually land, but do most employers even care about where you get your degree from? Do they care about the topic of your thesis? Who your advisor is? The specific coursework you’ve completed? I guess what I’m getting at is how much stress I should put into selecting an institution and should I go out of my way to invest all my energy in getting into a specific school if I want any chance at having a viable career in the field?

2 Comments
2024/03/15
00:56 UTC

3

Is it possible to calculate discharge on a weir with uneven flow?

I inherited an old 16’ contracted weir on a mountain stream that someone installed way too close to the bend in a river. I have no idea when the last time it was cleaned out so the approach is horrible and the stilling pool is full of rocks. On top of this, the staff gage and telemetry are installed on opposite sides of the weir and thus report 2 different stages due to the uneven flow across the blade. Is it even possible to make a reliable discharge calculation? I do a current measurement once a month and use the staff gage as my reference stage. I tried averaging the staff gage reads with my telemetry to calculate discharge which has actually resulted in a less than 10% difference with my measurements, but I feel like that is just coincidence. I don’t want to fit my data to the results

2 Comments
2024/03/14
14:10 UTC

4

Flowtracker 2 Error

Hi guys. I am experiencing the above error on a Sontek Flowtracker 2 ADV. Any suggestions on how to solve this?

9 Comments
2024/03/14
08:04 UTC

1

HEC RAS 2D HELP Terrain Mods and Rain on Grid

Hi HEC RAS users, I am modelling an urban flooding scenario and need some help with an output.

I have inserted my DEM, then modified the terrain values for my buildings using a modifications polygon layer - with a constant elevation for each building polygon. I also have a landcover raster layer that splits the buildings n-values and SCS infiltration values from their surrounding environment. I have set my n-value as lower than i usually would for building areas where I don't have polygons, it is 0.016, so water should move across those cells without too much difficulty.

When I run my Plan, I get a result that looks like the below, it seems as though the rain on grid in the building footprint is not making its way out of the building. Has anyone had this error before? Can anyone help me? Happy to clarify anyhting else.

https://preview.redd.it/6dqej1zj39oc1.png?width=687&format=png&auto=webp&s=4747d48d81ad31f5fb6d86f2dfff5848bb226a46

7 Comments
2024/03/14
07:23 UTC

3

Stormwater Reports for Solar Farms

Hi, Starting to do a lot of stormwater reports for Renewable Energy clients. Some difficult counties in IL is where the client and we are differing on fee for such reports. Been told this is a $5k effort by other firms and we are a factor of x3 from this. I’m struggling to see how a full stormwater report can be produced to satisfy the counties requirements for $5k. Anyone working on such projects and has an idea of the hours required. We estimated an 80 hour lift for these.

4 Comments
2024/03/14
01:11 UTC

8

Experienced Civil Engineer Seeking Advice on Starting an H&H Consulting Firm

Hello all,

I work a full time job (H&H) with conservatively speaking, 10 years of experience. Lately I have been considering starting my own consulting business with a focus on providing specialized services in modeling, as well as LOMR and CLOMR processes. My goal is to collaborate with large civil engineering firms and local government entities and or City/County

I'm writing to check if there are other engineers who ventured out on this path and now run their business with a team. I would like to know what the journey looked like from their perspective on below points:

  1. Building a Network: What are effective strategies for networking with potential clients in larger firms or city/county governments? How did you land your first contract?

  2. Marketing My Services: How can I effectively market my expertise? What channels (LinkedIn, industry forums, direct outreach) have worked best for you? Register with city as small business? Write a check to some local councilman’s election campaign and make connections?

  3. Proposal and Contract Tips: For those with experience in contract work, what are key elements to include in proposals to win contracts? ( I am not looking for something I can’t chew. I want to deliver quality work, build relationships and grow)

  4. Standing Out: There's quite a bit of competition in the consulting world. What unique value propositions or strategies have helped you stand out? Or if you are big firm what do you look for when sub contracting?

  5. Starting Out: For those who've taken the leap, what do you wish you knew when you were just starting your own consulting business?

  6. Workload: For those who are past their teething phase with their business, how did you handle work load? What did you do when you landed a bigger contract? Tried to work it yourself and keep the whole pie? When did you hire and what did you learn from your first big contract?

Any insights, success stories, or cautionary tales would be greatly appreciated as I begin this journey.

Till then I will keep mulling and keep peeping here for answers. -udc

11 Comments
2024/03/13
04:46 UTC

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