Fix bug with how observed storm impacts are were calculated

src/analysis/observed_storm_impacts.py

@@ -85,6 +85,10 @@ def volume_change(df_profiles, df_profile_features, zone):
             x_max=x_max,
         )
 
+        # No point keeping so many decimal places, let's round them
+        prestorm_vol = np.round(prestorm_vol, 2)
+        poststorm_vol = np.round(poststorm_vol, 2)
+
         df_vol_changes.loc[site_id, "prestorm_{}_vol".format(zone)] = prestorm_vol
         df_vol_changes.loc[site_id, "poststorm_{}_vol".format(zone)] = poststorm_vol
         df_vol_changes.loc[site_id, "{}_vol_change".format(zone)] = prestorm_vol - poststorm_vol
@@ -119,8 +123,8 @@ def storm_regime(df_observed_impacts):
     :return:
     """
     logger.info("Getting observed storm regimes")
-    df_observed_impacts.loc[df_observed_impacts.swash_vol_change < 3, "storm_regime"] = "swash"
-    df_observed_impacts.loc[df_observed_impacts.dune_face_vol_change > 3, "storm_regime"] = "collision"
+    df_observed_impacts.loc[df_observed_impacts.dune_face_vol_change <= 5, "storm_regime"] = "swash"
+    df_observed_impacts.loc[df_observed_impacts.dune_face_vol_change > 5, "storm_regime"] = "collision"
     return df_observed_impacts