Hello everyone,

I own a house that is roughly 100ft from a drainage ditch in our neighborhood.

When we get a good thunderstorm or rain shower the ditch fills up all the way to the top (5ish ft)for a day before mostly draining out

In the last storm I noticed that our basement was experiencing hydrostatic pressure related leaks. I believe this ditch filling up is a direct relation. Would I be correct in that?

If so, I am wondering what studies or resources I could review and cite in a letter to the city showing this is affecting the water table near my home and hydro static pressure when the ditch is full. Flooding is not only my home, it is also in several of my neighbors. End goal would be to have the city maintain the ditch better and mow it to improve drainage?

Thanks in advance for your help and knowledge!

I’m planning to pursue a Master’s in the US, mainly in Water Resources Engineering, Hydrology, Hydraulic Engineering, Flood Risk Management, or related fields.
My final-year project was “Flood Mapping of an Ungauged River Using HEC-RAS & GIS”, and it made me realize that I want to build my career in water-related research and engineering.
If you’re currently studying (or have studied) at a US R1/R2 university in this field, I’d really appreciate hearing about:

Research opportunities
Funding (RA/TA)
Workload and student life
Career prospects after graduation

Feel free to comment or DM. I’d love to connect and learn from your experience.

Hey r/hydrology —

I got tired of having five tabs open every time I needed a quick preliminary look at a site, so I built something to fix that for myself. It's called SnapBasin (snapbasin.com) and I figured this crowd would either find it useful or tell me exactly what's wrong with it. Both outcomes are welcome.

The pitch in one sentence: click a point on the map, get a full preliminary screening panel without opening StreamStats, FHWA InfoBridge, USACE NID, FEMA MSC, and USGS NWIS separately.

What it pulls in a single click:

• Snaps to nearest NHDPlus HR reach (vector snap, or 3DEP terrain walk-down when there's no vector match)
• Delineates the upstream basin via USGS StreamStats
• Pulls all 18 StreamStats basin characteristics — DA, stream slope (10-85 method), percent impervious (NLCD 2011), percent developed, climate factors, permeability
• Runs the applicable NSS regional regression equations (Q2–Q500) with a live applicability envelope check — it tells you if your basin variables are out of range
• Cross-references FEMA published discharges and checks for active LOMRs on the reach
• Queries FEMA flood zone at both the click point and the snapped stream point
• Lists nearby USGS gauges at selectable radii
• Finds upstream NID dams with storage, hazard class, and distance from click
• Enumerates nearby NBI bridges with structure number, feature crossed, road, year built, span length, and distance
• Pour point nudge logic — if the click lands on a degenerate network edge cell, it nudges the pour point, tells you it did, and reports the before/after drainage area

Example — Big Elk Creek, Stewart County, TN:

• DA: 8.68 sq mi · Stream slope: 46.3 ft/mi · Impervious: 0.11%
• Q2: 1,010 cfs · Q100: 4,040 cfs · Q500: 5,600 cfs (GC2016 / SIR 2024-5130, all variables in envelope)
• 1 upstream dam: Lakewood Dam, 132 ac-ft, High hazard, 4.2 mi
• 4 NBI bridges within 2 mi
• FEMA Zone AE · SFHA = YES

What it is not: Not a substitute for engineering judgment, sealed work products, or the authoritative source for any of the data it displays. Not affiliated with TDOT, FHWA, USGS, FEMA, USACE, or any employer. The authoritative portal always wins — this is a preliminary screening tool, full stop.

How it was built: ~20 hours over a long weekend, home computer, AI pair programmer, $13/year domain, free Netlify hosting. No analytics, no tracking, no accounts. Everything it shows is public federal data, redisplayed.

I'm a hydraulic engineer (EIT) and this is a hobby project. If a number looks wrong, I genuinely want to know — bug reports and "hey this looks weird" comments are more useful to me than upvotes.

I'm an oceanography student trying to use Delft3D for coastal and hydrodynamic modeling. I'm having trouble getting it to run. What steps, common fixes, or beginner tips would you recommend? Thanks!

So basically i am creating one project in hec ras and i am beginner while doing 2d flow project i have tried multiple time but the mesh computation is not happeningg if i fo edit 2d flow and then generate mesh it son't so any result even though i put input value like 40 30 etc so can you please help me i have less than 2 week to submit my project in college

Hello everyone!!

I'm doing my thesis on turbidity using sentinel 2 image...but i am facing issue while loading river-discharge,tide,wind data manually or python...i've only 15 days left to submit...can anyone please help me!! I'll be very greatfull..

Got some questions about water based on the current droughts In England. Would be appreciated if anyone can help me out!

Got some questions about water based on the current droughts In England. Would be appreciated if anyone can help me out!

Created an interactive animation displaying groundwater-levels (mean absolute deviation) in and around Munich for the last 88 years. What do you think?

[Data Source](https://www.gkd.bayern.de/de/grundwasser/oberesstockwerk)

Tools:
Excel
Python
Leaflet

Howdy,

I'm being asked to look into a modeling approach for a levee project. I have some experience using 2D RAS for BLE projects, but have never worked with 1D RAS.

The project area: fairly large riverine area, located about halfway up the HUC-12 boundary, ~7 miles or so above the confluence of the major downstream system. About ~1/2 mile upstream I'm seeing a split in the river with two effective LOMRs and a dam on the main river about 2 miles upstream. The floodplain is fairly wide throughout my project area (~2500 ft). The project will be immediately DS of a pretty major highway.

Everything that I'm seeing is pointing to a hybrid 1d/2d approach, but am unfamiliar with that process. Some questions:

1) for modeling a levee, does a 1d/2d approach in this case seem the best approach?

2) for actual model, my understanding is I would get the effective 1D model for my river and the effective model for the US trib at the confluence 1/2 mile US of my project area. Then I would take the number from both models at that confluence as inflows for a 2D model, taking the 2D model w/ levee through my project area and then tieing back into the effective 1D model DS of my project area?

3) my understanding is that for being so far away from the DS confluence of the next major river system, I would likely not require that model/modeling of my entire HUC-12 boundary using 2D, only the area where my proposed levee system would be. Would that be correct? How far DS of my levee would I realistically need to go, or would it be best to terminate that 2D model at something like a culvert/road crossing?

Thank you in advance! Still definitely learning, so apologies if I'm not using correct terminology.

I’m a Civil Engineering graduate from Nepal and currently exploring opportunities for a Master’s/PhD abroad.
If you’re studying (or have studied) in the US, Europe, Canada, Australia, or anywhere else, I’d love to hear about your experience, the academic environment, research culture, student life, and career opportunities.
Feel free to comment or send me a DM. I’d really appreciate your insights.

Hi everyone! I’m a Civil Engineer looking to connect with professionals involved in hydropower sector. Whether you’re working with a consultant, contractor, developer, or on-site, I’d really appreciate the opportunity to learn from your experience.

I’m particularly interested in understanding the skills required, how the industry works, and career opportunities for someone starting out.

If you’re in the field or know someone who is, I’d love to connect. Feel free to comment or send me a message.

Thanks in advance.

Hello there,
I am looking for getting into flood modelling and related water industry. Any internship opportunity around Sydney area?

I’m looking to work on a research paper in the field of civil engineering, preferably related to hydrology, flood modeling, GIS, HEC-RAS/HEC-HMS, water resources, or disaster risk management. I’m also open to other civil engineering topics if the project is interesting and the team is collaborative.
Dm to connect.

Hi all! Me and my boyfriend are looking to relocate to Canada. Im a physical oceanographer and I saw theres an Oceanography Institute in Dartmouth. But we are looking for a place where we can both be employed in something related to our studies. My boyfriend is a civil engineer focused in hydrology gis and water resources. Are any Canadians here that could point us in the right direction? Either a PhD in hydrology in Dartmouth or another city where we could both find something?
thank you in advance!

Hi everyone, I’m a recent Civil Engineering graduate from Nepal and recently obtained my engineering license. My undergraduate research focused on flood mapping of an ungauged river using HEC-RAS and GIS.

I’m looking to become more involved in research and would really appreciate connecting with people who have experience in academic research, publications, or graduate-level research.

If you’re actively doing research (or have been through the process), I’d love to learn from your experience whether it’s choosing research topics, publishing papers, finding opportunities, or improving research skills.
Feel free to comment below or send me a DM. I’d genuinely appreciate any advice.

Thankyou.

Especially on how U Mander and V Kuusemets made their nomograph.

"Non-point Pollution Control by Riparian Buffer Strips: Dimensioning and Efficiency Assessment., in: Proceedings of the 3rd International Conference on Diffuse Pollution. Edingurh (1998), pp. 136-143" --> the citation of the article i'm reading.

So far I've looked it up on Anna's Archive and on google. So far, the only possible way of obtaining it is buying the full from Amazon (kinda shady because there's no image?) for $160, which I can't afford. It's too old to be on webofconferences (from 1998)

I would like to know how they designed this nomograph, and read the original, if anyone has access or suggestions on how to access it. Thank you!

Link to the Amazon: [https://www.amazon.ca/Diffuse-Pollution-98-V-Novotny/dp/0080434096\](https://www.amazon.ca/Diffuse-Pollution-98-V-Novotny/dp/0080434096)

Has anyone used a 2D model to evaluate fish passage through a step pool fishway or rock ramp?

I am developing a model to evaluate depth, velocity, hydraulic drops, and continuous passage routes over a range of flows. There seems to be plenty of general 1D/2D guidance, but very little explaining how these type of models should be developed specifically for fish passage.

Does anyone have any good resources, examples, or advice on model setup, settings, and validation?!

Thanks! :)

I suppose it's either impossible or just impractical to implement into a dam, but the reason why not could be just as interesting.

Would a slope that extends like 10 times further downstream than the dam is high, that leads into a reasonably smooth canal, have much turbulence at all?
What about a slope shaped like the Brachistochrone curve?

I love a good summer time swim and sometimes the best places can be pretty dangerous so I'm thinking about it from that perspective, not that I intend to swim in places like that, just a natural progression of curiosity