Sediment Calibration Issue

[Ashwin Ghimire]

Hi All,

These are my SWAT Error Checker and Sediment calibration Line graphs.

As you can see my sediments are not even close to the observed data.

For parametrization, I was using these parameters for flow (NSE achieved: 0.68):

1:R__CN2.mgt            -0.026600       -0.100000      0.100000
2:V__SURLAG.bsn         1.122500        0.500000       2.000000
3:R__SOL_AWC(..).sol    0.038950        -0.050000      0.100000
4:V__ESCO.hru           0.777450        0.750000       0.900000
5:V__ALPHA_BF.gw        0.237590        0.080000       0.250000
6:V__GW_DELAY.gw        33.450001       15.000000      45.000000
7:V__CH_N2.rte          0.070810        0.030000       0.100000
8:V__CH_K2.rte          2.270000        2.000000       12.000000
9:R__OV_N.hru           0.017000        -0.100000      0.100000
10:R__SLSUBBSN.hru      0.248900        0.200000       0.300000
11:R__HRU_SLP.hru       -0.075900       -0.100000      0.000000
12:V__SFTMP.bsn         -1.540000       -10.000000     10.000000
13:V__SMTMP.bsn         2.940000        -10.000000     10.000000
14:V__SMFMX.bsn         9.469999        0.000000       10.000000
15:V__SMFMN.bsn         8.330000        0.000000       10.000000
16:V__TIMP.bsn          0.255000        0.000000       1.000000
17:R__DDRAIN.mgt        0.096200        -0.100000      0.100000
18:R__TDRAIN.mgt        0.061400        -0.100000      0.100000
19:R__GDRAIN.mgt        0.097000        -0.100000      0.100000

Even when I add 4/5 sediment parameters like spcon and spexp, the model does not seem sensitive to those parameters.

I think a lot of sediment is being trapped by the channel as the SWAT Error checker suggests. Can you tell me how should I move forward with this?

Thanks