5

Yes, you can interpolate the rainfall from stations outside the watershed. However, the quality of the interpolation will depend on the distance between the stations and the watershed, the prevailing weather patterns, and to some extent the topography. For example, it probably wouldn't be appropriate to use a station on the rainy side of a mountain divide ...


4

In short: Yes you can/should use stations outside of your watershed. More in detail: There is well known methods in hydrology to solve the situation you are presenting. One simple method is to build Thiessen Polygons on your map to model the incoming precipitation in your target watershed using gauge station located inside and outside your watershed. The ...


2

I have found the solution and it seems that in BASINS 4.1, user has to import wdm file before launching HSPF by going to 'File' and then to either 'import data' or 'manage data'. Once this step is done, BASINS 'understands' that there is a wdm file and then the user can add the wdm file from 'met stations' tab. The tutorials on epa site correspond to ...


2

I think there are a few things to consider. First, a drainage basin is defined as the area upstream of the point to which all precipitation converges. Flow does not converge at the outlet - flow converges at the lake. Outlets don't contain any additional information of the upstream area draining into the lake. This implies that to find the area draining into ...


2

This is a broad question, the best way to compare the models is to go through the manuals and compare the process algorithms to see how the various hydrologic processes are handled. There are other considerations as well, including: what environment/watershed are you modelling? How large, how urbanized, what type of soils/environment/precipitation vs ...


1

It depends on the size of the aquifer and the amount of precipitation falling on the exposed areas of the aquifer. These have been used to provide water form many major cities. The Trafalgar square fountains were initially powered by artesian pressure (as London is below the altitude of the North downs / Chilterns). Eventully too much water was extracted ...


1

I'll preface by saying I have no hands-on experience with either model; however, HSPF has always seemed cumbersome whereas SWAT seems more user friendly. Again, just my read of the software without any practical experience. But, until that person comes along to answer you're question, here's my two cents: The best way to answer this questions is to sit down ...


1

I would recommend looking at automatic stream network delineation and/or known stream locations features, and overlaying those as a check on the final watersheds created through whatever procedure you have. Watersheds can be merged or lumped together, which is fine, you just want to make sure it is consistent with the other information you have and what your ...


1

tldr; On the official support page titled AGNPS Climate Data -- agGEM & preGEM you find a download link to a climate data template file. Your data files need to have this format. All meteorological variables are written into this file. The template file contains daily data. It is not clear if either the data has to have daily resolution or the data can ...


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