- k_parent_in_water_sink - k_parent_in_water_parent_in_sediment - k_parent_in_water_A1_in_water

d_parent_in_water = - k_parent_in_water_sink * parent_in_water - k_parent_in_water_parent_in_sediment * parent_in_water + k_parent_in_sediment_parent_in_water * parent_in_sediment
d_parent_in_sediment = + k_parent_in_water_parent_in_sediment * parent_in_water - k_parent_in_sediment_sink * parent_in_sediment - k_parent_in_sediment_parent_in_water * parent_in_sediment - k_parent_in_sediment_A1_in_sediment * parent_in_sediment
d_A1_in_sediment = + k_parent_in_sediment_A1_in_sediment * parent_in_sediment - k_A1_in_sediment_sink * A1_in_sediment

- k_parent_in_sediment_sink - k_parent_in_sediment_parent_in_water - k_parent_in_sediment_A1_in_sediment

d_parent_in_water = - k_parent_in_water_sink * parent_in_water - k_parent_in_water_parent_in_sediment * parent_in_water - k_parent_in_water_A1 * parent_in_water + k_parent_in_sediment_parent_in_water * parent_in_sediment
d_parent_in_sediment = + k_parent_in_water_parent_in_sediment * parent_in_water - k_parent_in_sediment_sink * parent_in_sediment - k_parent_in_sediment_parent_in_water * parent_in_sediment - k_parent_in_sediment_A1 * parent_in_sediment
d_A1 = + k_parent_in_water_A1 * parent_in_water + k_parent_in_sediment_A1 * parent_in_sediment - k_A1_sink * A1

- k_parent_in_water_sink - k_parent_in_water_parent_in_sediment - k_parent_in_water_A1
- k_parent_in_sediment_sink - k_parent_in_sediment_parent_in_water - k_parent_in_sediment_A1