main entry point for setting up observations

def setup_observations(self):
        """ main entry point for setting up observations

        """
        obs_methods = [self.setup_water_budget_obs,self.setup_hyd,
                       self.setup_smp,self.setup_hob,self.setup_hds,
                       self.setup_sfr_obs]
        obs_types = ["mflist water budget obs","hyd file",
                     "external obs-sim smp files","hob","hds","sfr"]
        self.obs_dfs = {}
        for obs_method, obs_type in zip(obs_methods,obs_types):
            self.log("processing obs type {0}".format(obs_type))
            obs_method()
            self.log("processing obs type {0}".format(obs_type))