I'm currently working on a project where I am modeling the sediment transport through a creek. However there is no sediment concentration or transport data available from USGS. I have the compositional data for the sediment size distribution however. What method or formula could I use to get around the lack of data?

I'm currently completing my honors project for my BS degree which is examining salmon habitat (river bed) sediment size composition and how it changes with different flow regimes.

Is there a recommended software that could computate the change in bed sediment size composition with different flow regimes?

Hi everyone!

I would like to ask if any of you have worked with perched aquifers. As a part of my thesis, I'm studying the degree of connection between a perched water table and the regional groundwater system, but I'm struggling and would like to have more insights. The aquifer is in the Netherlands and I have shallow and deep head information (although at uneven time steps) and soil profiles.

I'm now trying to make a correlation analysis and see what happens :'c

Thanks in advance.

Hi everyone! Technically, the affinity laws assume constant efficiency, except that never really happens with pumps and turbines. What are the generally accepted changes in efficiency? Chat GPT said 10-20% change in efficiency is the normal rule of thumb. Is this true?

Folks, hello! Research on a topic pertaining to water resources is something we intend to do. It would be useful if somebody had a thought about a topic related to the current situation... Thanks for the feedback

Hello. Does anyone know about AquaBuoy, BREF-HB and F2-HB? Where can I get the specifications of these wave energy converters? Thank you.

Hi everyone,

Just doing some modelling and calibration in HEC-HMS and was wondering:

Which GoF index (NSE,RMSE,PBias or other) indicates if we're able to reproduce the observed peaks and the overall spread and shape of the curve?

[Question] How can I convert the PMP generated using Hershfield Method to a 24hr Hyetograph?

I only have a single value after computing PMP using the method. I have annual maximum daily rainfall data.

Hi! Might be the wrong place for this post, but couldn't find a better place.
I just got an issue on HEC-RAS 6.3.1. I can't open RAS Mapper. There are no errors. It just won't open. I have tried restarting computer, opening RAS Mapper in different projects but no luck.

I live in Sweden, from my home, I can't access the official website. From my University, I can. But it hasn't mattered before. Any help is appreciated! :)

I have a river and a field next to it (with its DEM). I want to determine the water's pathways in the field, when the water in the river reaches a certain level , based on the DEM only.

I am thinking of using r.lake but it only uses one point as a seed however I do know that during a flood event in point A of the river I will have a certain water level and point B another level.

Obviously a more precise hydraulic modelling of the river inundation is needed but I just want to have an idea of the pathways.

So this is more of a hydraulics question, but I'm guessing you guys will have some ideas. I'm designing a channel to divert flow from a watershed. I capture the flow (around 41 cfs) into an armored channel. The slope of the channel at one point goes to 7% giving super critical flow and a froude number 2.3. Generally I use HEC-14 to design energy dissipation. However, because HEC-14 is primarily used for culvert outlets, can it still be used for open channel flow? What sources do you use for energy dissipations? Looking forward to your reply.

I made a video on how climate change affects a specific locality from the perspective of water!

https://youtu.be/66aZb5HMmkI

Hi everybody, I have a simple question for you.

Does anybody know if these two pressure sensors will give the same values?

The pump circulates the water at constant rate in circles. Is it so that P2 measures the stagnation pressure, which is higher than static pressure at P1? The diagram is top-view.

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Is there a way to use gridded NOAA Precipitation data in a 2D Precipitation on Grid in HEC-RAS? Up till now, I took the point data received from NOAA, Generated a synthetic distribution (for a hypothetical storm), then calculated the hyetograph to plug it into the precipitation data. However, it would be nice to have the varying point depths that the gridded data can provide, similar to what happens in HMS. Is there a way to do this? Or is it just a pipe dream?

Hello everyone, i have a semester project for Ebro River in Spain. I have chosen for it the lower part of the river including the delta, the project is to identify some problems currently in the river (flood drought ecology etc) and then evaluate some potential solutions for the river basin. For the time, i require some data. If anyone can guide me to official sources that would be quite helpful. i want the discharge data for the river gauging stations if publicly available and also the hydrological data including temperatures, ET data and also the precipitation. Thanks in advance for guiding me

I have a question regarding the new NRCS Rainfall Distributions using NOAA Data that is replacing SCS for most of the US per NEH Part 630 Chapter 4. I can't seam to find a lot of resources on this and am hoping that you wonderful people can help me. I mainly have been modeling a lot of watershed in the west, (Utah, Wyoming, Arizona, etc...). Prior to starting hydrologic modeling in my career, our main hydrologist was using SCS Type II rainfall distributions for most of his modeling. From what NEH says, and other resources that I have found state the the Type II distribution is being replaced in most states.

USDA used to have a spreadsheet that would develop an unsmoothed curve on their website. However, that resource can no longer be found on their website (even though there is a link to it in NEH Part 630 Chapter 4). How are you guys developing this curve? Is there a software package that generates the smoothed and unsmoothed data for a study area that I'm not aware of? I'm also open to any other advise that you might have.

Thanks!

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This message occurs when I try to run optimization trial. And then at the end it shows failure to converge.

Do you spend a large amount of time creating breachlines to remove digital dams from DEMs?

I am a Water Resources Engineer, Geographic Information Science graduate student, and programming hobbyist. I have to complete a research project/paper during the final semester of my degree this fall. In the meantime, I'm doing preliminary topic exploration, data set discovery, etc., to prepare for the project.

I'm considering trying to develop an object detection computer vision model that locates culvert openings in terrain derivates from recent high-resolution 3DEP LIDAR collections. If successful, this could be a first step towards using a similar/expanded process for breachline generation.

However, my water resources experience is primarily in supporting transportation design projects rather than large-scale H&H modeling. While I'm interested in getting into that area of the field, I don't yet have the context to know if I'm trying to create a solution to a nonexistent problem.

I'm interested to hear if the above would be useful for your work and/or if the idea has any obvious fatal flaws. Thanks!

Hi everyone! I'm in my mid twenties with a B.S. in Geology and have been working in mostly education and interpretation for the past few years, but have been considering changing my trajectory. My current interests lie in our water and soil resources. I am considering going back to grad school, but I'm not sure what program to go for. One of the programs I'm considering is Hydrology. I'd love to hear from Hydrologists about their career experiences (what they do day to day, the importance of their work, if they enjoy their work, etc) and any advice they might have to give me. Thanks in advance!

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This job seems quite appealing to me. Does anyone have experience landing the job with just an associates degree in geology? I’m thinking I’ll have to get on with a private company and hopefully jump ship to the feds once I got enough experience. Any companies you’d recommend? Also are there any state agencies that would except a 2 year degree?

Hi, I graduated in 2022 with a B.S. in biology, with a focus on behavioral ecology. The job market is hyper-saturated, low paying, and mostly made up of seasonal jobs. It is very difficult to make a living wage and to advance and I honestly want out. I have been considering a career change and I have just started learning about a career in hydrology.

I am wondering, would you recommend this field to others? Would a biology degree be helpful in pursuing hydrology? What are some resources to find out more about hydrologist career pathways? What kind of schooling would I need? What is the job market like for hydrologists?

Thank you!

Hi.

I need to work with the SWMM to model drainage systems for my thesis. I'm just very overwhelmed by it and don't know how to start. I already did the basic tutorial. If someone is here that knows SWMM and want to guide me a bit at the start, it would be very appreciated.