@article{fdi:010070950,
  title = {{A}rticle modeling the fate and transport of malathion in the {P}agsanjan-{L}umban {B}asin, {P}hilippines},
  author = {{L}igaray, {M}. and {K}im, {M}. and {B}aek, {S}. and {R}a, {J}. {S}. and {C}hun, {J}. {A}. and {P}ark, {Y}. and {B}oithias, {L}aurie and {R}ibolzi, {O}livier and {C}hon, {K}. and {C}ho, {K}. {H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}xposure to highly toxic pesticides could potentially cause cancer and disrupt the development of vital systems. {M}onitoring activities were performed to assess the level of contamination; however, these were costly, laborious, and short-term leading to insufficient monitoring data. {H}owever, the performance of the existing {S}oil and {W}ater {A}ssessment {T}ool ({SWAT} model) can be restricted by its two-phase partitioning approach, which is inadequate when it comes to simulating pesticides with limited dataset. {T}his study developed a modified {SWAT} pesticide model to address these challenges. {T}he modified model considered the three-phase partitioning model that classifies the pesticide into three forms: dissolved, particle-bound, and dissolved organic carbon ({DOC})-associated pesticide. {T}he addition of {DOC}-associated pesticide particles increases the scope of the pesticide model by also considering the adherence of pesticides to the organic carbon in the soil. {T}he modified {SWAT} and original {SWAT} pesticide model was applied to the {P}agsanjan-{L}umban ({PL}) basin, a highly agricultural region. {M}alathion was chosen as the target pesticide since it is commonly used in the basin. {T}he pesticide models simulated the fate and transport of malathion in the {PL} basin and showed the temporal pattern of selected subbasins. {T}he sensitivity analyses revealed that application efficiency and settling velocity were the most sensitive parameters for the original and modified {SWAT} model, respectively. {D}egradation of particulate-phase malathion were also significant to both models. {T}he rate of determination ({R}-2) and {N}ash-{S}utcliffe efficiency ({NSE}) values showed that the modified model ({R}-2 = 0.52; {NSE} = 0.36) gave a slightly better performance compared to the original ({R}-2 = 0.39; {NSE} = 0.18). {R}esults from this study will be able to aid the government and private agriculture sectors to have an in-depth understanding in managing pesticide usage in agricultural watersheds.},
  keywords = {soil and water assessment tool ; pesticides ; malathion ; agricultural ; watershed ; modified {SWAT} model ; {PHILIPPINES} ; {PAGSANJAN}-{LUMBAN} {BASSIN}},
  booktitle = {},
  journal = {{W}ater},
  volume = {9},
  numero = {7},
  pages = {art. 451 [18 p.]},
  ISSN = {2073-4441},
  year = {2017},
  DOI = {10.3390/w9070451},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070950},
}