diff --git a/glofrim/__init__.py b/glofrim/__init__.py
index 87c7abe..ae8b671 100644
--- a/glofrim/__init__.py
+++ b/glofrim/__init__.py
@@ -2,6 +2,7 @@
 from glofrim.cmf_bmi import CMF
 from glofrim.dfm_bmi import DFM
 from glofrim.wfl_bmi import WFL
+from glofrim.sfincs_bmi import Sfincs
 from glofrim.lfp_bmi import LFP
 from glofrim.glofrim_bmi import Glofrim
 from glofrim.spatial_coupling import SpatialCoupling
diff --git a/glofrim/sfincs_bmi.py b/glofrim/sfincs_bmi.py
new file mode 100644
index 0000000..a7c7541
--- /dev/null
+++ b/glofrim/sfincs_bmi.py
@@ -0,0 +1,340 @@
+import numpy as np
+import sys
+from configparser import ConfigParser
+import logging
+import os
+from os.path import join, isfile, abspath, dirname, basename, relpath
+from datetime import datetime, timedelta
+from scipy.signal import convolve2d
+import rasterio
+import re
+
+from bmi.wrapper import BMIWrapper as _bmi
+
+from glofrim.utils import setlogger, closelogger
+from glofrim.gbmi import GBmi
+from glofrim.grids import RGrid
+import glofrim.glofrim_lib as glib
+
+class Sfincs(GBmi):
+    """
+    Glofrim implementation of the Sfincs BMI adaptor.
+    """
+    _name = 'Sfincs'
+    _long_name = 'Sfincs'
+    _version = ''
+    _var_units = {'SGCQin': 'm3/s', 'dA': 'm2', 'H': 'm'}
+    _input_var_names = ['SGCQin', 'dA']
+    _output_var_names = ['SGCQin', 'H']
+    _area_var_name = 'dA'
+    _timeunit = 'seconds'
+
+    def __init__(self, engine, loglevel=logging.INFO, logger=None):
+        self._bmi = _bmi(engine = engine)
+        if logger:
+            self.logger = logger.getChild(self._name)
+        else:
+            self.logger = setlogger(None, self._name, thelevel=loglevel)
+        self.initialized = False
+        self.grid = None
+
+    """
+    Model Control Functions
+    """
+    def initialize_config(self, config_fn, config_defaults={}):
+        if self.initialized:
+            raise Warning("model already initialized, it's therefore not longer possible to initialize the config")
+        # config settings
+        defaults = {
+            # 'tstart': '20000101 000000',
+            # 'tref': '20000101 000000',
+        }
+        defaults.update(**config_defaults)
+        self._config_fn = abspath(config_fn)
+        self._config = glib.configread(self._config_fn, encoding='utf-8', cf=ParConfigParser(defaults=defaults))
+        self._datefmt = "%Y%m%d %H%M%S"
+        # model time
+        self._dt = self.get_time_step()
+        self._startTime = self.get_start_time()
+        self._endTime = self.get_end_time()
+        self._t = self._startTime
+        # model paths
+        _root = dirname(self._config_fn)
+        self._mapdir = _root
+        self._outdir = _root
+        self.logger.info('Config initialized')
+
+    def initialize_model(self):
+        if not hasattr(self, '_config_fn'):
+            raise Warning('Run initialize_config before initialize_model')
+        # self.write_config() # write updated config to file as bmi does not allow direct access
+        self._bmi.initialize(self._config_fn)
+        self.initialized = True
+        self.logger.info('Model initialized')
+        # reset model time to make sure it is consistent with the model
+        self._dt = self.get_time_step()
+        self._startTime = self.get_start_time()
+        self._endTime = self.get_end_time()
+        self._t = self._startTime
+
+    def initialize(self, config_fn):
+        if not hasattr(self, '_config'):
+            self.initialize_config(config_fn)
+        self.initialize_model()
+            
+    def update(self, dt=None):
+        # dt in seconds. if not given model timestep is used
+        if self._t >= self._endTime:
+            raise Exception("endTime already reached, model not updated")
+        if (dt is not None) and (dt != self._dt.total_seconds()):
+            dt = timedelta(seconds=dt)
+            # because of the adaptive timestep scheme do not check the dt value
+            # if not glib.check_dts_divmod(dt, self._dt):
+            #     msg = "Invalid value for dt in comparison to model dt. Make sure a whole number of model timesteps ({}) fit in the given dt ({})"
+            #     raise ValueError(msg.format(self._dt, dt))
+        else:
+            dt = self._dt
+        t_next = self.get_current_time() + dt
+        i = 0
+        while self._t < t_next:
+            self._bmi.update()
+            self._t = self.get_current_time()
+            i += 1
+        self.logger.info('updated model to datetime {} in {:d} iterations'.format(self._t.strftime("%Y-%m-%d %H:%M:%S"), i))
+
+    def update_until(self, t, dt=None):
+        if (t<self._t) or t>self._endTime:
+            raise Exception("wrong time input: smaller than model time or larger than endTime")
+        while self._t < t:
+            self.update(dt=dt)
+
+    # not defined in CMF
+    def spinup(self):
+        """PCR specific spinup function"""
+        raise NotImplementedError()
+
+    def finalize(self):
+        self.logger.info('finalize bmi. Close logger.')
+        self._bmi.finalize()
+        closelogger(self.logger)
+
+
+    """
+    Variable Information Functions
+    """
+    
+    def get_start_time(self):
+        if self.initialized:
+            ref_timestr = self.get_attribute_value('tref')
+            refTime = datetime.strptime(ref_timestr, self._datefmt)
+            startTime_float = self._bmi.get_start_time()
+            startTime = refTime + timedelta(**{self.get_time_units(): startTime_float})
+        else:
+            start_timestr = self.get_attribute_value('tstart')
+            startTime = datetime.strptime(start_timestr, self._datefmt)
+        # startTime = refdate + timedelta(**{self.get_time_units(): TStart})
+        self._startTime = startTime
+        return self._startTime
+    
+    def get_current_time(self):
+        if self.initialized:
+            curtime = timedelta(**{self.get_time_units(): self._bmi.get_current_time()})
+            return self._startTime + curtime
+        else:
+            return self.get_start_time()
+
+    def get_end_time(self):
+        if self.initialized:
+            ref_timestr = self.get_attribute_value('tref')
+            refTime = datetime.strptime(ref_timestr, self._datefmt)
+            endTime_float = self._bmi.get_end_time()
+            endTime = refTime + timedelta(**{self.get_time_units(): endTime_float})
+
+        else:
+            stop_timestr = self.get_attribute_value('tstop')
+            endTime = datetime.strptime(stop_timestr, self._datefmt)
+
+        self._endTime = endTime
+        return self._endTime
+
+    def get_time_step(self):
+        if self.initialized:
+            dt = self._bmi.get_time_step()
+        else:
+            dt = float(1.e-6)  # TODO: check if this is
+        self._dt = timedelta(**{self.get_time_units(): dt})
+        return self._dt 
+
+    def get_time_units(self):
+        return self._timeunit
+
+
+    """
+    Variable Getter and Setter Functions
+    """
+    def get_mask(self, long_var_name):
+        if long_var_name in ['Qx', 'QxSGold', 'Qy', 'QySGold']:
+            if long_var_name in ['Qx', 'QxSGold']:
+                # expand mask in x-direction
+                mask = np.vstack([self.grid.mask, np.zeros((1, self.grid.mask.shape[1]))])
+                conv_filt = np.array([[1, 1]])  # horizontal convolution
+            elif long_var_name in ['Qy', 'QySGold']:
+                mask = np.hstack([self.grid.mask, np.zeros((self.grid.mask.shape[0], 1))])
+                conv_filt = np.array([[1], [1]])  # vertical convolution
+            mask = np.array(convolve2d(mask, conv_filt), dtype='bool')
+        else:
+            mask = self.grid.mask
+        return mask
+
+    def get_value(self, long_var_name, **kwargs):
+        var = np.rot90(np.asarray(self._bmi.get_var(long_var_name)).copy())
+        mask = self.get_mask(long_var_name)
+        var[~mask] = np.nan
+        # ensure boundary vals are also set to NaN
+        var[var==-99999] = np.nan
+        return var
+
+    def get_value_at_indices(self, long_var_name, inds, **kwargs):
+        return self.get_value(long_var_name).flat[inds]
+
+    def set_value(self, long_var_name, src, fill_value=0., **kwargs):
+        # set nans that lie within to_mod model domain to zeros to prevent model crashes
+        mask = self.get_mask(long_var_name)
+        src[mask & np.isnan(src)] = 0.
+        # set remaining nans to missing value
+        src = np.where(np.isnan(src), fill_value, src).astype(self.get_var_type(long_var_name))
+        # LFP does not have a set_var function, but used the get_var function with an extra argument
+        self._bmi.set_var(long_var_name, np.rot90(src, k=3))  # rotate to match the order of Sfincs internal grids
+
+    def set_value_at_indices(self, long_var_name, inds, src, **kwargs):
+        val = self.get_value(long_var_name)
+        val.flat[inds] = src
+        self.set_value(long_var_name, val)
+
+    """
+    Grid Information Functions
+    """
+    def get_grid(self):
+        if not hasattr(self, 'grid') or (self.grid is None):
+            # get the 2d dem values directly from bmi
+            dem_grid = np.rot90(self._bmi.get_var("zb"))
+            transform = rasterio.transform.Affine(
+                float(self.get_attribute_value('dx')),
+                0.,
+                float(self.get_attribute_value('x0')),
+                0.,
+                float(self.get_attribute_value('dy')),
+                float(self.get_attribute_value('y0')),
+            )
+            self.grid = RGrid(
+                transform,
+                int(self.get_attribute_value('nmax')) + 2,  # the +2 is for the boundary conditions
+                int(self.get_attribute_value('mmax')) + 2,  # the +2 is for the boundary conditions
+                crs=int(self.get_attribute_value('epsg')),
+                mask=np.isfinite(dem_grid)
+            )
+            # # riv width file used for "1D coords"
+            # _width_fn = glib.getabspath(str(self.get_attribute_value('SGCwidth')), self._mapdir)
+            # if not isfile(_width_fn): raise IOError('SGCwidth file not found')
+            # with rasterio.open(_width_fn, 'r') as ds:
+            #     row, col = np.where(ds.read(1)>0)
+            #     x, y = self.grid.xy(row=row, col=col)
+            #     inds = self.grid.ravel_multi_index(row, col)
+            # self.grid.set_1d(nodes=np.vstack((x, y)).transpose(), links=None, inds=inds)  # python2.7 nodes=np.array(zip(x, y))
+        return self.grid
+
+
+    """
+    set and get attribute / config 
+    """
+
+    def set_start_time(self, start_time):
+        if isinstance(start_time, datetime):
+            refdate = start_time.strftime(self._datefmt)
+        elif isinstance(start_time, str):
+            try:
+                refdate = start_time # str
+                start_time = datetime.strptime(start_time, self._datefmt) # check format
+            except ValueError:
+                raise ValueError('wrong date format, use "yyyy-mm-dd"')
+        else:
+            raise ValueError('wrong start_date datatype')
+        self._startTime = start_time
+        self._t = start_time
+        self.set_attribute_value('refdate', refdate)
+
+    def set_end_time(self, end_time):
+        if isinstance(end_time, str):
+            try:
+                end_time = datetime.strptime(end_time, self._datefmt)
+            except ValueError:
+                raise ValueError('wrong end_date format, use "yyyy-mm-dd"')
+        if not isinstance(end_time, datetime):
+            raise ValueError('wrong end_date datatype')
+        refdate = self.get_start_time()
+        assert end_time >  refdate
+        TStop = (end_time - refdate).seconds + (end_time - refdate).days * 86400
+        TStop = '{:.0f}'.format(TStop)
+        self._endTime = end_time
+        self.set_attribute_value('sim_time', TStop)
+
+    def set_out_dir(self, out_dir):
+        self.set_attribute_value('dirroot', relpath(out_dir, dirname(self._config_fn)))
+        self._outdir = abspath(out_dir)
+
+    def get_attribute_names(self):
+        glib.configcheck(self, self.logger)
+        return glib.configattr(self._config)
+    
+    def get_attribute_value(self, attribute_name):
+        glib.configcheck(self, self.logger)
+        # always use "general" as config header; as file has no config header this is hard-coded
+        if ':' not in attribute_name:
+            attribute_name = 'general:{}'.format(attribute_name)
+        else:
+            attribute_name = 'general:{}'.format(attribute_name.split(':')[1])
+        self.logger.debug("get_attribute_value: {}".format(attribute_name))
+        return glib.configget(self._config, attribute_name)
+    
+    def set_attribute_value(self, attribute_name, attribute_value):
+        glib.configcheck(self, self.logger)
+        # always use "general" as config header; as file has no config header this is hard-coded
+        if ':' not in attribute_name:
+            attribute_name = 'general:{}'.format(attribute_name)
+        else:
+            attribute_name = 'general:{}'.format(attribute_name.split(':')[1])
+        self.logger.debug("set_attribute_value: {} -> {}".format(attribute_name, attribute_value))
+        return glib.configset(self._config, attribute_name, str(attribute_value))
+
+    def write_config(self):
+        """write adapted config to file. just before initializing
+        only for models which do not allow for direct access to model config via bmi"""
+        self._config_fn = glib.write_config(self, self._config, self._config_fn, self.logger)
+
+# UTILS
+class ParConfigParser(ConfigParser):
+    def __init__(self, **kwargs):
+        self.optionxform = lambda option:option # keep format with capital/lower letters
+        defaults = dict(comment_prefixes=('!', '/', '#'),
+                        inline_comment_prefixes=('!'), allow_no_value=True,
+                        delimiters=('='))
+        defaults.update(**kwargs)
+        super(ParConfigParser, self).__init__(**defaults)
+
+    def read_file(self, f, **kwargs):
+        def par2ini(f, header_name):
+            """change par to ini before parse as ini
+            note that this removes comments"""
+            yield '[{}]\n'.format(header_name)
+            for line in f:
+                # yield '='.join(line.split()[:2])
+                yield line
+        super(ParConfigParser, self).read_file(par2ini(f, 'general'), **kwargs)
+        
+    def _write_section(self, fp, section_name, section_items, delimiter):
+        """Write a single section to the specified `fp'."""
+        for key, value in section_items:
+            value = self._interpolation.before_write(self, section_name, key, value)
+            value = ' ' + str(value).replace('\n', '\n\t')
+            fp.write("{}{}\n".format(key, value))
+        fp.write("\n")