diff --git a/imod/tests/test_wq/test_wq_ani.py b/imod/tests/test_wq/test_wq_ani.py
new file mode 100644
index 000000000..8e781efdc
--- /dev/null
+++ b/imod/tests/test_wq/test_wq_ani.py
@@ -0,0 +1,30 @@
+import textwrap
+from pathlib import Path
+
+from imod.wq import HorizontalAnisotropy, HorizontalAnisotropyFile
+
+
+def test_render_ani():
+    ani = HorizontalAnisotropy(factor=1.0, angle=0.0)
+
+    compare = textwrap.dedent(
+        """\
+        [ani]
+            anifile = ani/test.ani
+        """
+    )
+
+    assert ani._render(modelname="test", directory=Path("./ani"), nlayer=1) == compare
+
+
+def test_render_anifile():
+    ani = HorizontalAnisotropyFile(anifile="test.test")
+
+    compare = textwrap.dedent(
+        """\
+        [ani]
+            anifile = ani/test.ani
+        """
+    )
+
+    assert ani._render(modelname="test", directory=Path("./ani"), nlayer=1) == compare
diff --git a/imod/tests/test_wq/test_wq_hfb.py b/imod/tests/test_wq/test_wq_hfb.py
new file mode 100644
index 000000000..92dc6a4e5
--- /dev/null
+++ b/imod/tests/test_wq/test_wq_hfb.py
@@ -0,0 +1,17 @@
+import textwrap
+from pathlib import Path
+
+from imod.wq import HorizontalFlowBarrier
+
+
+def test_render():
+    hfb = HorizontalFlowBarrier(hfbfile=None)
+
+    compare = textwrap.dedent(
+        """\
+        [hfb6]
+            hfbfile = hfb/test.hfb
+        """
+    )
+
+    assert hfb._render(modelname="test", directory=Path("./hfb")) == compare
diff --git a/imod/wq/__init__.py b/imod/wq/__init__.py
index 6cbaf02ef..08e2d5b4f 100644
--- a/imod/wq/__init__.py
+++ b/imod/wq/__init__.py
@@ -14,6 +14,7 @@
     AdvectionModifiedMOC,
     AdvectionTVD,
 )
+from imod.wq.ani import HorizontalAnisotropy, HorizontalAnisotropyFile
 from imod.wq.bas import BasicFlow
 from imod.wq.btn import BasicTransport
 from imod.wq.chd import ConstantHead
@@ -26,6 +27,7 @@
     EvapotranspirationTopLayer,
 )
 from imod.wq.ghb import GeneralHeadBoundary
+from imod.wq.hfb import HorizontalFlowBarrier
 from imod.wq.lpf import LayerPropertyFlow
 from imod.wq.mal import MassLoading
 from imod.wq.model import SeawatModel
diff --git a/imod/wq/ani.py b/imod/wq/ani.py
new file mode 100644
index 000000000..29381ee44
--- /dev/null
+++ b/imod/wq/ani.py
@@ -0,0 +1,182 @@
+import pathlib
+import re
+import shutil
+
+import numpy as np
+
+import imod
+from imod.wq.pkgbase import Package
+
+
+class HorizontalAnisotropyFile(Package):
+    """
+    Horizontal Anisotropy package.
+
+    Parameters
+    ----------
+    anifile: str
+        is the file location of the imod-wq ani-file. This file contains the
+        anisotropy factor and angle of each layer, either as a constant or a
+        reference to the file location of an '.arr' file. No checks are
+        implemented for this file, user is responsible for consistency with
+        model.
+    """
+
+    _pkg_id = "ani"
+
+    _template = "[ani]\n" "    anifile = {anifile}\n"
+
+    def __init__(
+        self,
+        anifile,
+    ):
+        super().__init__()
+        self["anifile"] = anifile
+
+    def _render(self, modelname, directory, nlayer):
+        # write ani file
+        # in render function, as here we know where the model is run from
+        # and how many layers: store this info for later use in save
+        self.anifile = f"{modelname}.ani"
+        self.rendir = directory
+        self.nlayer = nlayer
+
+        d = {"anifile": f"{directory.as_posix()}/{modelname}.ani"}
+
+        return self._template.format(**d)
+
+    def save(self, directory):
+        """Overload save function.
+        Saves anifile to location, along with referenced .arr files
+        assumes _render() to have run previously"""
+        directory.mkdir(exist_ok=True)  # otherwise handled by idf.save
+
+        path_ani = pathlib.Path(str(self["anifile"].values))
+
+        # regex adapted from stackoverflow: https://stackoverflow.com/questions/54990405/a-general-regex-to-extract-file-paths-not-urls
+        rgx = r"((?:[a-zA-Z]:|(?<![:/\\])[\\\/](?!CLOSE)(?!close )|\~[\\\/]|(?:\.{1,2}[\\\/])+)[\w+\\\s_\-\(\)\/]*(?:\.\w+)*)"
+        with open(path_ani, "r") as f, open(directory / self.anifile, "w") as f2:
+            for line in f:
+                p = re.search(rgx, line)
+                if p:
+                    # path to file detected,
+                    # replace to relative and
+                    # copy to directory
+                    path = pathlib.Path(p[0])
+                    f2.write(
+                        line.replace(p[0], f"{self.rendir.as_posix()}/{path.name}")
+                    )
+                    if not path.is_absolute():
+                        path = path_ani.parent / path
+                    shutil.copyfile(path, directory / path.name)
+                else:
+                    f2.write(line)
+
+    def _pkgcheck(self, ibound=None):
+        pass
+
+
+class HorizontalAnisotropy(Package):
+    """
+    Horizontal Anisotropy package.
+    Anisotropy is a phenomenon for which the permeability k is not equal along the x- and y Cartesian axis.
+
+    Parameters
+    ----------
+    factor : float or xr.DataArray of floats
+        The anisotropic factor perpendicular to the main principal axis (axis of highest permeability).
+        Factor between 0.0 (full anisotropic) and 1.0 (full isotropic).
+    angle : float or xr.DataArray of floats
+        The angle along the main principal axis (highest permeability) measured in degrees from north (0),
+        east (90), south (180) and west (270).
+    """
+
+    _pkg_id = "ani"
+
+    _template = "[ani]\n" "    anifile = {anifile}\n"
+
+    def __init__(
+        self,
+        factor,
+        angle,
+    ):
+        super().__init__()
+        self["factor"] = factor
+        self["angle"] = angle
+
+    def _render(self, modelname, directory, nlayer):
+        # write ani file
+        # in render function, as here we know where the model is run from
+        # and how many layers: store this info for later use in save
+        self.anifile = f"{modelname}.ani"
+        self.rendir = directory
+        self.nlayer = nlayer
+
+        d = {"anifile": f"{directory.as_posix()}/{modelname}.ani"}
+
+        return self._template.format(**d)
+
+    def save(self, directory):
+        """Overload save function.
+        Saves anifile to location, along with created .arr files
+        assumes _render() to have run previously"""
+        directory.mkdir(exist_ok=True)  # otherwise handled by idf.save
+
+        nodata_val = {"factor": 1.0, "angle": 0.0}
+
+        def _check_all_equal(da):
+            return np.all(np.isnan(da)) or np.all(
+                da.values[~np.isnan(da)] == da.values[~np.isnan(da)][0]
+            )
+
+        def _write(path, da, nodata=1.0e20, dtype=np.float32):
+            if not _check_all_equal(da):
+                dx, xmin, xmax, dy, ymin, ymax = imod.util.spatial_reference(da)
+                ncol, nrow = da.shape
+                footer = f" DIMENSIONS\n{ncol}\n{nrow}\n{xmin}\n{ymin}\n{xmax}\n{ymax}\n{nodata}\n0\n{dx}\n{dx}"
+                a = np.nan_to_num(da.values, nan=nodata)
+                return np.savetxt(
+                    path, a, fmt="%.5f", delimiter=" ", footer=footer, comments=""
+                )
+            else:
+                # write single value to ani file
+                pass
+
+        for name, da in self.dataset.data_vars.items():  # pylint: disable=no-member
+            if "y" in da.coords and "x" in da.coords:
+                path = pathlib.Path(directory).joinpath(f"{name}.arr")
+                imod.array_io.writing._save(
+                    path,
+                    da,
+                    nodata=nodata_val[name],
+                    pattern=None,
+                    dtype=np.float32,
+                    write=_write,
+                )
+
+        # save anifile with data stored during _render
+        with open(directory / self.anifile, "w") as f:
+            for lay in range(1, self.nlayer + 1):
+                for prm in ["factor", "angle"]:
+                    da = self.dataset[prm]
+                    if "layer" in da.coords and "y" in da.coords and "x" in da.coords:
+                        a = da.sel(layer=lay)
+                        if not _check_all_equal(a):
+                            f.write(
+                                f"open/close {self.rendir.as_posix()}/{prm}_l{float(lay):.0f}.arr 1.0D0 (FREE) -1 {prm}_l{float(lay):.0f}\n"
+                            )
+                        else:
+                            if np.all(np.isnan(a)):
+                                val = nodata_val[prm]
+                            else:
+                                val = a[~np.isnan()][0]
+                            f.write(
+                                f"constant {float(val):.5f} {prm}_l{float(lay):.0f}\n"
+                            )
+                    else:
+                        f.write(
+                            f"constant {float(self.dataset[prm].values):.5f} {prm}_l{float(lay):.0f}\n"
+                        )
+
+    def _pkgcheck(self, ibound=None):
+        pass
diff --git a/imod/wq/hfb.py b/imod/wq/hfb.py
new file mode 100644
index 000000000..f856970f3
--- /dev/null
+++ b/imod/wq/hfb.py
@@ -0,0 +1,48 @@
+import pathlib
+import shutil
+
+from imod.wq.pkgbase import Package
+
+
+class HorizontalFlowBarrier(Package):
+    """
+    Horizontal Flow Barrier package.
+
+    Parameters
+    ----------
+    hfbfile: str
+        is the file location of the imod-wq hfb-file. This file contains cell-
+        to-cell resistance values. The hfb file can be constructed from generate
+        files using imod-batch. No checks are implemented for this file, user is
+        responsible for consistency with model.
+    """
+
+    _pkg_id = "hfb6"
+
+    _template = "[hfb6]\n" "    hfbfile = {hfbfile}\n"
+
+    def __init__(
+        self,
+        hfbfile,
+    ):
+        super().__init__()
+        self["hfbfile"] = hfbfile
+
+    def _render(self, modelname, directory, *args, **kwargs):
+        self.hfbfile = f"{modelname}.hfb"
+        d = {"hfbfile": f"{directory.as_posix()}/{modelname}.hfb"}
+
+        return self._template.format(**d)
+
+    def save(self, directory):
+        """Overloads save function.
+        Saves hfbfile to directory
+        assumes _render() to have run previously"""
+        directory.mkdir(exist_ok=True)  # otherwise handled by idf.save
+
+        path_hfb = pathlib.Path(str(self["hfbfile"].values))
+
+        shutil.copyfile(path_hfb, directory / self.hfbfile)
+
+    def _pkgcheck(self, ibound=None):
+        pass
diff --git a/imod/wq/model.py b/imod/wq/model.py
index 74a5ef9b7..aeff8a94e 100644
--- a/imod/wq/model.py
+++ b/imod/wq/model.py
@@ -605,6 +605,15 @@ def _bas_btn_rch_evt_mal_tvc_sinkssources(self):
 
         return n_extra
 
+    def _render_anihfb(self, key, modelname, directory, nlayer):
+        pkgkey = self._get_pkgkey(key)
+        if pkgkey is not None:
+            return self[pkgkey]._render(
+                modelname=modelname, directory=directory / pkgkey, nlayer=nlayer
+            )
+        else:
+            return ""
+
     def render(self, directory, result_dir, writehelp):
         """
         Render the runfile as a string, package by package.
@@ -636,6 +645,17 @@ def render(self, directory, result_dir, writehelp):
                 )
             )
 
+        # ani and hfb packages
+        for key in ("ani", "hfb6"):
+            content.append(
+                self._render_anihfb(
+                    key=key,
+                    modelname=self.modelname,
+                    directory=directory,
+                    nlayer=nlayer,
+                )
+            )
+
         # multi-system package group: chd, drn, ghb, riv, wel
         modflowcontent, ssm_content, n_sinkssources = self._render_groups(
             directory=directory, globaltimes=globaltimes
@@ -793,7 +813,7 @@ def write(
             if (
                 "x" in pkg.dataset.coords
                 and "y" in pkg.dataset.coords
-                or pkg._pkg_id == "wel"
+                or pkg._pkg_id in ("wel", "ani", "hfb6")
             ):
                 try:
                     pkg.save(directory=directory / pkgname)