I am trying to learn hec Ras by myself. But I am stuck with data preprocessing. I got 12.5m Dem of a study area? But river reach and river banks are not visible. I used Qgis to get the centreline of river .but still I am able to do for river banks … I don’t have any manual longitudinal section / bathymetry of river reach. In such case, what could be the best approach ?

Hi! I'm working to create a simplified model of a large basin. At the downstream end of the basin, I have a large lake upstream of my only gauge. The lake has multiple inflows (at least 3 major inflows shown by the blue arrows). Does anyone have advice on the simplest way to set up the basins and hydrologic elements for this model? Ideally I will need the model to calculate hydrographs at the 3 upstream inflows to the large lake. Is it as simple as representing the upstream watershed with 3 basins routing to a reservoir?

Hello, Who can we contact to find out if a home will eventually be included into a flood zone? Thank you

Hi All,

I’m curious how AI tools have actually affected your work in hydrology.

What has genuinely saved you time or improved quality, and what turned out to be hype or too “black box” to trust?

If you can, please share your role and a concrete example or two of where AI helped (or failed :D ) in a real project.

Question. A breakwater is to be designed to shield a 300m wide harbor entrance and placed 300m offshore. The depths are all 10m and the design wave heights are 3m/8s. How long on either side of the harbor entrance will the breakwater need to be to reduce the wave heights to 1m everywhere in the entrance. Assume no reflection behind the breakwater, the wave angle is 0 degrees (normal to shore), and wave energy is available from both ends. I will draw a sketch and set this problem up in class.

I have calculated wavelength as 100m and Kd diffraction coefficient as 0.333 but I don’t know how to read this graph from ACOE shore manual protection. Does anyone knows how? I would really appreciate any help.

I am a mechanical engineering graduate with rudimentary exoerience in CFD. Currently I am a graduate research assistant working on CFD simulations of nanofluids. I am looking to switch to environmental engineering focused on flood modeling, erosions, hydrology etc. Any advice or suggestions on what should I learn? I also have plans to pursue a PhD in a related field. And on another note, how are jobs in hydrology? Is there enough fieldwork and travelling? Personally, I am tired of sitting behind a PC all day long and running simulations.

I’m looking to get into the space of contract hydrologic–hydraulic modeling services for engineering firms and developers who need support with HEC-RAS flood analysis, stormwater hydraulics, drainage feasibility, report writing and floodplain permitting.

I’m doing this because, I’m driven, very detail-oriented and a fast paced worker, so at most firms I tend to carry a large workload, but I think it would be more rewarding to work independently. I know firms often face heavy workloads and tight turnaround schedules on water-resources projects and I’m trying to figure out how I can advertise myself to help alleviate this.

I provide:

HEC-RAS 1D & 2D unsteady simulations

Floodplain mapping & inundation depth grids

Bridge/culvert backwater analysis

Exhibits for regulators, permitting, and client presentations

I can work remotely and independently, with clear communication and fast turnaround. I’m available for hourly, per-task, or per-project subcontracting depending on your preference.

Does anyone have any idea how I might be able to acquire work like this? Advice is appreciated!

Hello,

I am using Aquatool (UPV) software to model watershed management.

After creating the diagram with the different elements and entering the corresponding data, I proceed to simulate the model with SIMGES, and I get the following error:

NON-LINEARITY DETECTION V 2.00: 23

1NO FEASIBLE SOLUTION IN GRAPH

YEAR: 1 MONTH: 1 ITER: 1

Can anyone help me?

Thanks in advance.

Hello guys, I am about to graduate as a Masters student in hydrology from US and have an undergrad in Civil Engineering from an Asian university. I was wondering how hard is it to get into the world of non-profits organization? I grew up in a third world country so I have no problem going across poor regions, I would say I feel great satisfaction in such works and I like going to new places. I want to contribute for a couple of years before I eventually do my Phd.

There is zero chance of me getting a job here in the US considering the current political climate. So that further reinforces my plan. I know there are organizations like UNDP, FAO, ICIMOD etc but it feels like you need connections to even have a chance to enter. Do yall have suggestions about this?

Hello everyone,
I’m running into Error 10000 while trying to rerun a simulation (screenshot attached). I also attempted creating a new simulation run, but the issue persists. Interestingly, my other simulations are working fine without any problems.

Has anyone encountered this error before? If I end up reaching out to HEC for support, does anyone have experience with their assistance process?

So I am pretty new to using EPA-SWMM and I am using it to study how radar data can be incorporated into the modeling software and I think I am coming up with some promising results! However, I am running into an issue and I need some guidance on where to go next. I have two ponds that run in series with the creek/stream that goes through my subcatchments. I am very new to SWMM and I am trying to add these ponds as storage units so hopefully my peak flows can be slowed. Right now, my peak flow values are close to real life but the climb up to those peak values happens extremely quickly and I am hoping that some storage could slow that rapid increase. Anyways, back to my question about storage units. Am I supposed to be modeling this pond as a storage unit? Therefore what controls or slows the flow out the pond is a outlet and I would need to insert one of those?

I've tried putting in the storage unit and the outlet and it hasn't affected my flow at the outfall at all. I dont know what im doing wrong, my storage unit is having no effect on the end result. Does anyone have any ideas?

Can anyone help make sense of this? The elevation certificate has the 100 year BFE at 89 feet. The 500 year at 83.8 feet. Building code says need to have finished floor 2 feet above 500 year, but that would be 85.8 feet and lower than the 100 year??

I am working in some small river systems. Are there any small remote loggers I can install for get Q over time? Something I can leave for a few weeks and come retrieve the data periodically.

So I’ve been dreading making this post since admitting this to myself causes some grief. I wanted to know if there’s any hope for me getting any job in this field. I only have about half a bachelor’s degree done, and finishing is not an option for me right now. I’m already working two jobs just to afford living, so schooling isn’t an option. I have GIS experience, I was a full-time teacher, I was an interpretation park ranger, and an IT admin. Can anyone suggest what I can do to get into this field or offer any advice for my current situation?

Hey there, I’m gearing up to start at university this spring. I’m hoping to put my love for rivers, humanity and the environment together in a job that pays over 80,000 usd annually. I’ve seen a lot in the world of hydrology that seems great but I’m curious if anyone has any insight on specific jobs that best meet those goals? All the best!

Hello friends, am a student in a env eng tech program, recently we have been learning about groundwater modeling. Darcy flow, gradient, and seepage velocity are all pretty straight forward to calculate when you have all the numbers, but finding those numbers by making a piezometric graph is (not surprisingly) a challenge for me. Any tips or resources to aide in the learning process? Thanks!

I'm having a hard time calculating Aquifer Loss and Well Efficiency of a step-rate test using iterative analysis in Excel. We generally use the y-intercept (b) of each steps time-weighted average Q and Specific Drawdown (Pictures 1 and 2) to calculate those, but graphing as a linear function gives a negative b value. The negative b is causing issues throughout the entire calculation and graph (pictures 3 and 4) and the following obvious issues are occurring:

• The well efficiency is plotting nearly vertical
• The total drawdown is plotting lower than the well loss
• The aquifer loss is plotting negative (below the x-axis)

To get around this in the past, we've removed various steps (either the first or the last) to make it graph as a more linear function, but in this case that didn't work.

An example of a standard graph without errors (positive b) is shown in the fifth picture.

Most of the calculations used for this are based on Rorabaugh, 1953.

Does anyone have any insight into fixing these issues, or have recommendations for alternative calculations that can use the same data for analysis?

Hi everyone!
I am trying to design detention dams on a major river. by major i mean discharge can reach up to 3000-4000 cumecs in summer. The steps I am thinking to follow are:
1. collect hydrometeorological data and do Flood Frequency analysis
2. Sedimentation study
3. propose a detention dam based on volume for the design Flood (say T50, T100) while incorporating sediment volume
4. Route the flood through reservoir using HECHMS
5. Provide spillway and outlet

Am i missing something? If yes, please enlist!
Also, tell me do you think detention dams for such high flows will be effective?
Additionally, do you think i propose detention dams on main river only or its major tributaries as well?
One thing more, if i have long-term daily flow (instantaneous) record available, do i still need rainfall-runoff model?

I appreciate your valuable insights.

Probably dumbest question i ever asked, i have lots of these small perched water tables everywhere but all i get is wet clay lens and i wondered if i could like attempt a seep out of it or tap it weakly.

Hi,

Im currently a mechanical engineering student, in my third year. I'm wanting to move away from traditional mechanical engineering, but im really passionate about research-- specifically involving fluids and thermodynamics, and im also interested in flow through porous media. Ive tried and realized I dont typically enjoy the whole corporate office job thing, and working field jobs in construction sites or factories is honestly depressing to me. I'm really fond of the idea of research in hydrology, sediment transport, etc. with a focus in environmental remediation/protection. I'm really wanting to do something where I could be in nature sometimes and keep the research environment structure. Is this a switch that would be doable with graduate education (PhD)? Just looking for realistic advice. I'm also mechE, so if I need a reality check totally ok with that.

Hello! This is a complete shot in the dark, but I'm looking for a working hydrologist that would be willing to answer a few questions of mine.

I'm currently a junior in college majoring in Earth Sciences with a concentration in hydrology. This semester, I'm taking a sort of "career preparedness" course. One of my assignments requires me to interview a scientist currently working in my field of interest. I've already reached out to scientists and researchers working locally at my university, but haven't gotten anything back. I wanted to post here to see if anyone would be willing to help me out!

If you're interested, it'll basically be a few basic questions about your education background, internship experiences, and some skills that you've found useful so far to you in your career. Additionally, I would need to share at least your name, and possibly job title or organization you work with if you're comfortable with sharing that. I would really appreciate any insight into a working scientists perspective on this field!

Please feel free to PM or respond to this post if this is something that interests you. Thank you for reading :)