R/zchunk_L232.water.demand.manufacturing.R

In rohmin9122/gcam-korea-release: Build the GCAM-Korea Input Datasets

#' module_water_L232.water.demand.manufacturing
#'
#' Computes manufacturing water withdrawal/consumption coefficients (m3/GJ output) by region and year
#'
#' @param command API command to execute
#' @param ... other optional parameters, depending on command
#' @return Depends on \code{command}: either a vector of required inputs,
#' a vector of output names, or (if \code{command} is "MAKE") all
#' the generated outputs: \code{L232.TechCoef}. The corresponding file in the
#' original data system was \code{L232.water.demand.manufacturing.R} (water level2).
#' @details Describe in detail what this chunk does.
#' @importFrom assertthat assert_that
#' @importFrom dplyr filter mutate select
#' @importFrom tidyr gather spread
#' @author GPK June 2018
module_water_L232.water.demand.manufacturing <- function(command, ...) {
  if(command == driver.DECLARE_INPUTS) {
    return(c(FILE = "common/GCAM_region_names",
             FILE = "water/A03.sector",
             FILE = "energy/A32.globaltech_coef",
             "L132.water_km3_R_ind_Yh",
             "L232.StubTechProd_industry"))
  } else if(command == driver.DECLARE_OUTPUTS) {
    return(c("L232.TechCoef"))
  } else if(command == driver.MAKE) {

    all_data <- list(...)[[1]]

    stub.technology <- subs.share.weight <- tech.share.weight <- share.weight.year <-
      water_sector <- water_type <- region <- supplysector <- subsector <- technology <-
      year <- minicam.energy.input <- coefficient <- market.name <- calOutputValue <-
      water_km3 <- energy_EJ <- NULL  # silence package check notes

    # Load required inputs
    GCAM_region_names <- get_data(all_data, "common/GCAM_region_names")
    A03.sector <- get_data(all_data, "water/A03.sector")
    A32.globaltech_coef <- get_data(all_data, "energy/A32.globaltech_coef")
    L132.water_km3_R_ind_Yh <- get_data(all_data, "L132.water_km3_R_ind_Yh")

    # Extrapolate this one to all model years if necessary
    get_data(all_data, "L232.StubTechProd_industry") %>%
      complete(nesting(region, supplysector, subsector, stub.technology), year = MODEL_YEARS) %>%
      group_by(region, supplysector, subsector, stub.technology) %>%
      arrange(year) %>%
      mutate(calOutputValue = approx_fun(year, calOutputValue, rule = 2),
             subs.share.weight = approx_fun(year, subs.share.weight, rule = 2),
             tech.share.weight = approx_fun(year, tech.share.weight, rule = 2),
             share.weight.year = approx_fun(year, share.weight.year, rule = 2)) %>%
      ungroup ->
      L232.StubTechProd_industry

    # First, compute historical coefficients, as total withdrawals/consumption divided by industrial sector output
    # (base-service)
    L232.water_km3_R_ind_Yh <-
      filter(L132.water_km3_R_ind_Yh, year %in% MODEL_BASE_YEARS) %>%
      left_join_error_no_match(GCAM_region_names, by = "GCAM_region_ID") %>%
      left_join_error_no_match(L232.StubTechProd_industry, by = c("region", "year")) %>%
      rename(energy_EJ = calOutputValue) %>%
      mutate(coefficient = round(water_km3 / energy_EJ, digits = energy.DIGITS_COEFFICIENT)) ->
      L232.water_km3_R_ind_Yh

    # Read in water coefs for all years
    L232.water_km3_R_ind_Yh %>%
      select(region, water_type, year, coefficient) %>%
      repeat_add_columns(distinct(A32.globaltech_coef, supplysector, subsector, technology)) %>%
      mutate(water_sector = "Manufacturing",
             minicam.energy.input = set_water_input_name(water_sector, water_type, A03.sector),
             market.name = region) %>%
      select(LEVEL2_DATA_NAMES$TechCoef) %>%
      # Fill out the values in the final base year to all future years
      group_by(region, supplysector, subsector, technology, minicam.energy.input, market.name) %>%
      complete(year = MODEL_YEARS) %>%
      mutate(coefficient = if_else(year %in% MODEL_FUTURE_YEARS, coefficient[year == max(MODEL_BASE_YEARS)], coefficient)) %>%
      ungroup() %>%

      # add attributes for output
      add_title("Water withdrawal and consumption coefficients for manufacturing") %>%
      add_units("m3/GJ") %>%
      add_comments("Manufacturing water demand coefficients by region, water type, and year") %>%
      add_legacy_name("L232.TechCoef") %>%
      add_precursors("common/GCAM_region_names",
                     "water/A03.sector",
                     "energy/A32.globaltech_coef",
                     "L132.water_km3_R_ind_Yh",
                     "L232.StubTechProd_industry") ->
      L232.TechCoef

    return_data(L232.TechCoef)
  } else {
    stop("Unknown command")
  }
}