/* ************************************************************************* */ int compare_array_2d(N_array_2d * a, N_array_2d * b) { int rows, cols, type; int i, j, res = 0; cols = a->cols; rows = a->rows; type = N_get_array_2d_type(a); #pragma omp parallel for private (i, j) shared (cols, rows, type, a, b) reduction(+:res) for (j = 0; j < rows; j++) { for (i = 0; i < cols; i++) { if (type == CELL_TYPE) { if (N_get_array_2d_c_value(a, i, j) != N_get_array_2d_c_value(b, i, j)) res++; } if (type == FCELL_TYPE) { if (N_get_array_2d_f_value(a, i, j) != N_get_array_2d_f_value(b, i, j)) res++; } if (type == DCELL_TYPE) { if (N_get_array_2d_d_value(a, i, j) != N_get_array_2d_d_value(b, i, j)) res++; } } } return res; }
/* ************************************************************************* */ int fill_array_2d(N_array_2d * a) { int rows, cols, type; int i, j, res = 0; rows = a->rows; cols = a->cols; type = N_get_array_2d_type(a); #pragma omp parallel for private (i, j) shared (cols, rows, type, a) reduction(+:res) for (j = 0; j < rows; j++) { for (i = 0; i < cols; i++) { if (type == CELL_TYPE) { N_put_array_2d_c_value(a, i, j, (CELL) i * (CELL) j); if (N_get_array_2d_c_value(a, i, j) != (CELL) i * (CELL) j) res++; } if (type == FCELL_TYPE) { N_put_array_2d_f_value(a, i, j, (FCELL) i * (FCELL) j); if (N_get_array_2d_f_value(a, i, j) != (FCELL) i * (FCELL) j) res++; } if (type == DCELL_TYPE) { N_put_array_2d_d_value(a, i, j, (DCELL) i * (DCELL) j); if (N_get_array_2d_d_value(a, i, j) != (DCELL) i * (DCELL) j) res++; } } } return res; }
/* ************************************************************************* */ void copy_result(N_array_2d * status, N_array_2d * phead_start, double *result, struct Cell_head *region, N_array_2d * target) { int y, x, rows, cols, count, stat; double d1 = 0; DCELL val; rows = region->rows; cols = region->cols; count = 0; for (y = 0; y < rows; y++) { G_percent(y, rows - 1, 10); for (x = 0; x < cols; x++) { stat = N_get_array_2d_c_value(status, x, y); if (stat == N_CELL_ACTIVE) { /*only active cells */ d1 = result[count]; val = (DCELL) d1; count++; } else if (stat == N_CELL_DIRICHLET) { /*dirichlet cells */ d1 = N_get_array_2d_d_value(phead_start, x, y); val = (DCELL) d1; count++; } else { G_set_null_value(&val, 1, DCELL_TYPE); } N_put_array_2d_d_value(target, x, y, val); } } return; }
/* **************************************************************** */ int make_les_entry_2d(int i, int j, int offset_i, int offset_j, int count, int pos, N_les * les, G_math_spvector * spvect, N_array_2d * cell_count, N_array_2d * status, N_array_2d * start_val, double entry, int cell_type) { int K; int di = offset_i; int dj = offset_j; K = N_get_array_2d_c_value(cell_count, i + di, j + dj) - N_get_array_2d_c_value(cell_count, i, j); /* active cells build the linear equation system */ if (cell_type == N_CELL_ACTIVE) { /* dirichlet or transmission cells must be handled like this */ if (N_get_array_2d_c_value(status, i + di, j + dj) > N_CELL_ACTIVE && N_get_array_2d_c_value(status, i + di, j + dj) < N_MAX_CELL_STATE) les->b[count] -= N_get_array_2d_d_value(start_val, i + di, j + dj) * entry; else if (N_get_array_2d_c_value(status, i + di, j + dj) == N_CELL_ACTIVE) { if ((count + K) >= 0 && (count + K) < les->cols) { G_debug(5, " make_les_entry_2d: (N_CELL_ACTIVE) create matrix entry at row[%i] col[%i] value %g\n", count, count + K, entry); pos++; if (les->type == N_SPARSE_LES) { spvect->index[pos] = count + K; spvect->values[pos] = entry; } else { les->A[count][count + K] = entry; } } } } /* if dirichlet cells should be used then check for all valid cell neighbours */ else if (cell_type == N_CELL_DIRICHLET) { /* all valid cells */ if (N_get_array_2d_c_value(status, i + di, j + dj) > N_CELL_INACTIVE && N_get_array_2d_c_value(status, i + di, j + dj) < N_MAX_CELL_STATE) { if ((count + K) >= 0 && (count + K) < les->cols) { G_debug(5, " make_les_entry_2d: (N_CELL_DIRICHLET) create matrix entry at row[%i] col[%i] value %g\n", count, count + K, entry); pos++; if (les->type == N_SPARSE_LES) { spvect->index[pos] = count + K; spvect->values[pos] = entry; } else { les->A[count][count + K] = entry; } } } } return pos; }
/*! * \brief Write info and content of the N_array_2d struct to stdout * * Offsets are ignored * * \param data N_array_2d * * \return void * */ void N_print_array_2d(N_array_2d * data) { int i, j; N_print_array_2d_info(data); for (j = 0 - data->offset; j < data->rows + data->offset; j++) { for (i = 0 - data->offset; i < data->cols + data->offset; i++) { if (data->type == CELL_TYPE) fprintf(stdout, "%6d ", N_get_array_2d_c_value(data, i, j)); else if (data->type == FCELL_TYPE) fprintf(stdout, "%6.6f ", N_get_array_2d_f_value(data, i, j)); else if (data->type == DCELL_TYPE) printf("%6.6f ", N_get_array_2d_d_value(data, i, j)); } fprintf(stdout, "\n"); } fprintf(stdout, "\n"); return; }
/*! * \brief Integrate Dirichlet or Transmission boundary conditions into the les (2s) * * Dirichlet and Transmission boundary conditions will be integrated into * the provided linear equation system. This is meaningfull if * the les was created with #N_assemble_les_2d_dirichlet, because in * this case Dirichlet boundary conditions are not automatically included. * * The provided les will be modified: * * Ax = b will be splitted into Ax_u + Ax_d = b * * x_u - the unknowns * x_d - the Dirichlet cells * * Ax_u = b -Ax_d will be computed. Then the matrix A will be modified to * * | A_u 0 | x_u * | 0 I | x_d * * \param les N_les* -- the linear equation system * \param geom N_geom_data* -- geometrical data information * \param status N_array_2d* -- the status array containing the cell types * \param start_val N_array_2d* -- an array with start values * \return int -- 1 = success, 0 = failure * */ int N_les_integrate_dirichlet_2d(N_les * les, N_geom_data * geom, N_array_2d * status, N_array_2d * start_val) { int rows, cols; int count = 0; int i, j, x, y, stat; double *dvect1; double *dvect2; G_debug(2, "N_les_integrate_dirichlet_2d: integrating the dirichlet boundary condition"); rows = geom->rows; cols = geom->cols; /*we nned to additional vectors */ dvect1 = (double *)G_calloc(les->cols, sizeof(double)); dvect2 = (double *)G_calloc(les->cols, sizeof(double)); /*fill the first one with the x vector data of Dirichlet cells */ count = 0; for (y = 0; y < rows; y++) { for (x = 0; x < cols; x++) { stat = N_get_array_2d_c_value(status, x, y); if (stat > N_CELL_ACTIVE && stat < N_MAX_CELL_STATE) { dvect1[count] = N_get_array_2d_d_value(start_val, x, y); count++; } else if (stat == N_CELL_ACTIVE) { dvect1[count] = 0.0; count++; } } } #pragma omp parallel default(shared) { /*perform the matrix vector product and */ if (les->type == N_SPARSE_LES) G_math_Ax_sparse(les->Asp, dvect1, dvect2, les->rows); else G_math_d_Ax(les->A, dvect1, dvect2, les->rows, les->cols); #pragma omp for schedule (static) private(i) for (i = 0; i < les->cols; i++) les->b[i] = les->b[i] - dvect2[i]; } /*now set the Dirichlet cell rows and cols to zero and the * diagonal entry to 1*/ count = 0; for (y = 0; y < rows; y++) { for (x = 0; x < cols; x++) { stat = N_get_array_2d_c_value(status, x, y); if (stat > N_CELL_ACTIVE && stat < N_MAX_CELL_STATE) { if (les->type == N_SPARSE_LES) { /*set the rows to zero */ for (i = 0; i < les->Asp[count]->cols; i++) les->Asp[count]->values[i] = 0.0; /*set the cols to zero */ for (i = 0; i < les->rows; i++) { for (j = 0; j < les->Asp[i]->cols; j++) { if (les->Asp[i]->index[j] == count) les->Asp[i]->values[j] = 0.0; } } /*entry on the diagonal */ les->Asp[count]->values[0] = 1.0; } else { /*set the rows to zero */ for (i = 0; i < les->cols; i++) les->A[count][i] = 0.0; /*set the cols to zero */ for (i = 0; i < les->rows; i++) les->A[i][count] = 0.0; /*entry on the diagonal */ les->A[count][count] = 1.0; } } if (stat >= N_CELL_ACTIVE) count++; } } return 0; }
/*! * \brief Assemble a linear equation system (les) based on 2d location data (raster) * * * The linear equation system type can be set to N_NORMAL_LES to create a regular * matrix, or to N_SPARSE_LES to create a sparse matrix. This function returns * a new created linear equation system which can be solved with * linear equation solvers. An 2d array with start values and an 2d status array * must be provided as well as the location geometry and a void pointer to data * passed to the callback which creates the les row entries. This callback * must be defined in the N_les_callback_2d strcuture. * * The creation of the les is parallelized with OpenMP. * If you implement new callbacks, please make sure that the * function calls are thread safe. * * * the les can be created in two ways, with dirichlet and similar cells and without them, * to spare some memory. If the les is created with dirichlet cell, the dirichlet boundary condition * must be added. * * \param les_type int * \param geom N_geom_data* * \param status N_array_2d * * \param start_val N_array_2d * * \param data void * * \param cell_type int -- les assemble based on N_CELL_ACTIVE or N_CELL_DIRICHLET * \param call N_les_callback_2d * * \return N_les * * */ N_les *N_assemble_les_2d_param(int les_type, N_geom_data * geom, N_array_2d * status, N_array_2d * start_val, void *data, N_les_callback_2d * call, int cell_type) { int i, j, count = 0, pos = 0; int cell_type_count = 0; int **index_ij; N_array_2d *cell_count; N_les *les = NULL; G_debug(2, "N_assemble_les_2d: starting to assemble the linear equation system"); /* At first count the number of valid cells and save * each number in a new 2d array. Those numbers are used * to create the linear equation system. * */ cell_count = N_alloc_array_2d(geom->cols, geom->rows, 1, CELL_TYPE); /* include dirichlet cells in the les */ if (cell_type == N_CELL_DIRICHLET) { for (j = 0; j < geom->rows; j++) { for (i = 0; i < geom->cols; i++) { /*use all non-inactive cells for les creation */ if (N_CELL_INACTIVE < N_get_array_2d_c_value(status, i, j) && N_get_array_2d_c_value(status, i, j) < N_MAX_CELL_STATE) cell_type_count++; } } } /*use only active cell in the les */ if (cell_type == N_CELL_ACTIVE) { for (j = 0; j < geom->rows; j++) { for (i = 0; i < geom->cols; i++) { /*count only active cells */ if (N_CELL_ACTIVE == N_get_array_2d_d_value(status, i, j)) cell_type_count++; } } } G_debug(2, "N_assemble_les_2d: number of used cells %i\n", cell_type_count); if (cell_type_count == 0) G_fatal_error ("Not enough cells [%i] to create the linear equation system. Check the cell status. Only active cells (value = 1) are used to create the equation system.", cell_type_count); /* Then allocate the memory for the linear equation system (les). * Only valid cells are used to create the les. */ index_ij = (int **)G_calloc(cell_type_count, sizeof(int *)); for (i = 0; i < cell_type_count; i++) index_ij[i] = (int *)G_calloc(2, sizeof(int)); les = N_alloc_les_Ax_b(cell_type_count, les_type); count = 0; /*count the number of cells which should be used to create the linear equation system */ /*save the i and j indices and create a ordered numbering */ for (j = 0; j < geom->rows; j++) { for (i = 0; i < geom->cols; i++) { /*count every non-inactive cell */ if (cell_type == N_CELL_DIRICHLET) { if (N_CELL_INACTIVE < N_get_array_2d_c_value(status, i, j) && N_get_array_2d_c_value(status, i, j) < N_MAX_CELL_STATE) { N_put_array_2d_c_value(cell_count, i, j, count); index_ij[count][0] = i; index_ij[count][1] = j; count++; G_debug(5, "N_assemble_les_2d: non-inactive cells count %i at pos x[%i] y[%i]\n", count, i, j); } /*count every active cell */ } else if (N_CELL_ACTIVE == N_get_array_2d_c_value(status, i, j)) { N_put_array_2d_c_value(cell_count, i, j, count); index_ij[count][0] = i; index_ij[count][1] = j; count++; G_debug(5, "N_assemble_les_2d: active cells count %i at pos x[%i] y[%i]\n", count, i, j); } } } G_debug(2, "N_assemble_les_2d: starting the parallel assemble loop"); /* Assemble the matrix in parallel */ #pragma omp parallel for private(i, j, pos, count) schedule(static) for (count = 0; count < cell_type_count; count++) { i = index_ij[count][0]; j = index_ij[count][1]; /*create the entries for the */ N_data_star *items = call->callback(data, geom, i, j); /* we need a sparse vector pointer anytime */ G_math_spvector *spvect = NULL; /*allocate a sprase vector */ if (les_type == N_SPARSE_LES) { spvect = G_math_alloc_spvector(items->count); } /* initial conditions */ les->x[count] = N_get_array_2d_d_value(start_val, i, j); /* the entry in the vector b */ les->b[count] = items->V; /* pos describes the position in the sparse vector. * the first entry is always the diagonal entry of the matrix*/ pos = 0; if (les_type == N_SPARSE_LES) { spvect->index[pos] = count; spvect->values[pos] = items->C; } else { les->A[count][count] = items->C; } /* western neighbour, entry is col - 1 */ if (i > 0) { pos = make_les_entry_2d(i, j, -1, 0, count, pos, les, spvect, cell_count, status, start_val, items->W, cell_type); } /* eastern neighbour, entry col + 1 */ if (i < geom->cols - 1) { pos = make_les_entry_2d(i, j, 1, 0, count, pos, les, spvect, cell_count, status, start_val, items->E, cell_type); } /* northern neighbour, entry row - 1 */ if (j > 0) { pos = make_les_entry_2d(i, j, 0, -1, count, pos, les, spvect, cell_count, status, start_val, items->N, cell_type); } /* southern neighbour, entry row + 1 */ if (j < geom->rows - 1) { pos = make_les_entry_2d(i, j, 0, 1, count, pos, les, spvect, cell_count, status, start_val, items->S, cell_type); } /*in case of a nine point star, we have additional entries */ if (items->type == N_9_POINT_STAR) { /* north-western neighbour, entry is col - 1 row - 1 */ if (i > 0 && j > 0) { pos = make_les_entry_2d(i, j, -1, -1, count, pos, les, spvect, cell_count, status, start_val, items->NW, cell_type); } /* north-eastern neighbour, entry col + 1 row - 1 */ if (i < geom->cols - 1 && j > 0) { pos = make_les_entry_2d(i, j, 1, -1, count, pos, les, spvect, cell_count, status, start_val, items->NE, cell_type); } /* south-western neighbour, entry is col - 1 row + 1 */ if (i > 0 && j < geom->rows - 1) { pos = make_les_entry_2d(i, j, -1, 1, count, pos, les, spvect, cell_count, status, start_val, items->SW, cell_type); } /* south-eastern neighbour, entry col + 1 row + 1 */ if (i < geom->cols - 1 && j < geom->rows - 1) { pos = make_les_entry_2d(i, j, 1, 1, count, pos, les, spvect, cell_count, status, start_val, items->SE, cell_type); } } /*How many entries in the les */ if (les->type == N_SPARSE_LES) { spvect->cols = pos + 1; G_math_add_spvector(les->Asp, spvect, count); } if (items) G_free(items); } /*release memory */ N_free_array_2d(cell_count); for (i = 0; i < cell_type_count; i++) G_free(index_ij[i]); G_free(index_ij); return les; }
/* ************************************************************************* */ int main(int argc, char *argv[]) { struct GModule *module = NULL; N_gwflow_data2d *data = NULL; N_geom_data *geom = NULL; N_les *les = NULL; N_les_callback_2d *call = NULL; double *tmp_vect = NULL; struct Cell_head region; double error, sor, max_norm = 0, tmp; int maxit, i, inner_count = 0; char *solver; int x, y, stat; N_gradient_field_2d *field = NULL; N_array_2d *xcomp = NULL; N_array_2d *ycomp = NULL; char *buff = NULL; int with_river = 0, with_drain = 0; /* Initialize GRASS */ G_gisinit(argv[0]); module = G_define_module(); module->keywords = _("raster, hydrology"); module->description = _("Numerical calculation program for transient, confined and unconfined groundwater flow in two dimensions."); /* Get parameters from user */ set_params(); if (G_parser(argc, argv)) exit(EXIT_FAILURE); /* Make sure that the current projection is not lat/long */ if ((G_projection() == PROJECTION_LL)) G_fatal_error(_("Lat/Long location is not supported by %s. Please reproject map first."), G_program_name()); /*Check the river parameters */ if (param.river_leak->answer == NULL && param.river_bed->answer == NULL && param.river_head->answer == NULL) { with_river = 0; } else if (param.river_leak->answer != NULL && param.river_bed->answer != NULL && param.river_head->answer != NULL) { with_river = 1; } else { G_fatal_error (_("Please provide river_head, river_leak and river_bed maps")); } /*Check the drainage parameters */ if (param.drain_leak->answer == NULL && param.drain_bed->answer == NULL) { with_drain = 0; } else if (param.drain_leak->answer != NULL && param.drain_bed->answer != NULL) { with_drain = 1; } else { G_fatal_error(_("Please provide drain_head and drain_leak maps")); } /*Set the maximum iterations */ sscanf(param.maxit->answer, "%i", &(maxit)); /*Set the calculation error break criteria */ sscanf(param.error->answer, "%lf", &(error)); sscanf(param.sor->answer, "%lf", &(sor)); /*set the solver */ solver = param.solver->answer; if (strcmp(solver, N_SOLVER_DIRECT_LU) == 0 && param.sparse->answer) G_fatal_error(_("The direct LU solver do not work with sparse matrices")); if (strcmp(solver, N_SOLVER_DIRECT_GAUSS) == 0 && param.sparse->answer) G_fatal_error(_("The direct Gauss solver do not work with sparse matrices")); if (strcmp(solver, N_SOLVER_DIRECT_CHOLESKY) == 0 && param.sparse->answer) G_fatal_error(_("The direct cholesky solver do not work with sparse matrices")); /*get the current region */ G_get_set_window(®ion); /*allocate the geometry structure for geometry and area calculation */ geom = N_init_geom_data_2d(®ion, geom); /*Set the function callback to the groundwater flow function */ call = N_alloc_les_callback_2d(); N_set_les_callback_2d_func(call, (*N_callback_gwflow_2d)); /*gwflow 2d */ /*Allocate the groundwater flow data structure */ data = N_alloc_gwflow_data2d(geom->cols, geom->rows, with_river, with_drain); /* set the groundwater type */ if (param.type->answer) { if (strncmp("unconfined", param.type->answer, 10) == 0) { data->gwtype = N_GW_UNCONFINED; } else { data->gwtype = N_GW_CONFINED; } } /*Set the calculation time */ sscanf(param.dt->answer, "%lf", &(data->dt)); G_message("Calculation time: %g", data->dt); /*read all input maps into the memory and take care of the * null values.*/ N_read_rast_to_array_2d(param.phead->answer, data->phead); N_convert_array_2d_null_to_zero(data->phead); N_copy_array_2d(data->phead, data->phead_start); N_read_rast_to_array_2d(param.status->answer, data->status); N_convert_array_2d_null_to_zero(data->status); N_read_rast_to_array_2d(param.hc_x->answer, data->hc_x); N_convert_array_2d_null_to_zero(data->hc_x); N_read_rast_to_array_2d(param.hc_y->answer, data->hc_y); N_convert_array_2d_null_to_zero(data->hc_y); N_read_rast_to_array_2d(param.s->answer, data->s); N_convert_array_2d_null_to_zero(data->s); N_read_rast_to_array_2d(param.top->answer, data->top); N_convert_array_2d_null_to_zero(data->top); N_read_rast_to_array_2d(param.bottom->answer, data->bottom); N_convert_array_2d_null_to_zero(data->bottom); /*river is optional */ if (with_river) { N_read_rast_to_array_2d(param.river_bed->answer, data->river_bed); N_read_rast_to_array_2d(param.river_head->answer, data->river_head); N_read_rast_to_array_2d(param.river_leak->answer, data->river_leak); N_convert_array_2d_null_to_zero(data->river_bed); N_convert_array_2d_null_to_zero(data->river_head); N_convert_array_2d_null_to_zero(data->river_leak); } /*drainage is optional */ if (with_drain) { N_read_rast_to_array_2d(param.drain_bed->answer, data->drain_bed); N_read_rast_to_array_2d(param.drain_leak->answer, data->drain_leak); N_convert_array_2d_null_to_zero(data->drain_bed); N_convert_array_2d_null_to_zero(data->drain_leak); } /*Recharge is optional */ if (param.r->answer) { N_read_rast_to_array_2d(param.r->answer, data->r); N_convert_array_2d_null_to_zero(data->r); } /*Sources or sinks are optional */ if (param.q->answer) { N_read_rast_to_array_2d(param.q->answer, data->q); N_convert_array_2d_null_to_zero(data->q); } /* Set the inactive values to zero, to assure a no flow boundary */ for (y = 0; y < geom->rows; y++) { for (x = 0; x < geom->cols; x++) { stat = N_get_array_2d_c_value(data->status, x, y); if (stat == N_CELL_INACTIVE) { /*only inactive cells */ N_put_array_2d_d_value(data->hc_x, x, y, 0); N_put_array_2d_d_value(data->hc_y, x, y, 0); N_put_array_2d_d_value(data->s, x, y, 0); N_put_array_2d_d_value(data->q, x, y, 0); } } } /*assemble the linear equation system and solve it */ les = create_solve_les(geom, data, call, solver, maxit, error, sor); /* copy the result into the phead array for output or unconfined calculation */ copy_result(data->status, data->phead_start, les->x, ®ion, data->phead); N_convert_array_2d_null_to_zero(data->phead); /****************************************************/ /*explicite calculation of free groundwater surface */ /****************************************************/ if (data->gwtype == N_GW_UNCONFINED) { /* allocate memory and copy the result into a new temporal vector */ if (!(tmp_vect = (double *)calloc(les->rows, sizeof(double)))) G_fatal_error(_("Out of memory")); /*copy data */ for (i = 0; i < les->rows; i++) tmp_vect[i] = les->x[i]; /*count the number of inner iterations */ inner_count = 0; do { G_message(_("Calculation of unconfined groundwater flow loop %i\n"), inner_count + 1); /* we will allocate a new les for each loop */ if (les) N_free_les(les); /*assemble the linear equation system and solve it */ les = create_solve_les(geom, data, call, solver, maxit, error, sor); /*calculate the maximum norm of the groundwater height difference */ tmp = 0; max_norm = 0; for (i = 0; i < les->rows; i++) { tmp = fabs(les->x[i] - tmp_vect[i]); if (max_norm < tmp) max_norm = tmp; /*copy the result */ tmp_vect[i] = les->x[i]; } G_message(_("Maximum difference between this and last increment: %g"), max_norm); /* copy the result into the phead array */ copy_result(data->status, data->phead_start, les->x, ®ion, data->phead); N_convert_array_2d_null_to_zero(data->phead); /**/ inner_count++; } while (max_norm > 0.01 && inner_count < 50); if (tmp_vect) free(tmp_vect); } /*write the result to the output file */ N_write_array_2d_to_rast(data->phead, param.output->answer); /*release the memory */ if (les) N_free_les(les); /*Compute the the velocity field if required and write the result into three rast maps */ if (param.vector->answer) { field = N_compute_gradient_field_2d(data->phead, data->hc_x, data->hc_y, geom, NULL); xcomp = N_alloc_array_2d(geom->cols, geom->rows, 1, DCELL_TYPE); ycomp = N_alloc_array_2d(geom->cols, geom->rows, 1, DCELL_TYPE); N_compute_gradient_field_components_2d(field, xcomp, ycomp); G_asprintf(&buff, "%s_x", param.vector->answer); N_write_array_2d_to_rast(xcomp, buff); G_asprintf(&buff, "%s_y", param.vector->answer); N_write_array_2d_to_rast(ycomp, buff); if (buff) G_free(buff); if (xcomp) N_free_array_2d(xcomp); if (ycomp) N_free_array_2d(ycomp); if (field) N_free_gradient_field_2d(field); } if (data) N_free_gwflow_data2d(data); if (geom) N_free_geom_data(geom); if (call) G_free(call); return (EXIT_SUCCESS); }