@article{fdi:010090342,
  title = {{M}orphometric properties, scaling laws and hydrologic response of the {G}reater {P}aris combined sewer system},
  author = {{A}chour, {M}. and {C}hahinian, {N}an{\'e}e and {C}hancibault, {K}. and {A}ndrieu, {H}. and {M}oussa, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}orphometric properties of channel networks are useful tools to classify catchments and calculate their hydrological response. {S}caling laws have been established for {O}ptimal {C}hannel {N}etworks ({OCN}s), which are defined based on a generative geomorphological mechanism of minimizing the total energy dissipation. {H}owever, sewer networks obey engineering efficiency rules and are conceived based on local optimizations, both in time and space, for minimal costs. {N}ot all the scaling laws have been verified for artificial sewer networks found in urban areas. {T}his raises questions regarding the applicability of {OCN} scaling laws to sewer networks and their potential impact on the shape of the {G}eomorphological {I}nstantaneous {U}nit {H}ydrograph ({GIUH}). {H}ence, this work aims to study the morphometric properties of the {G}reater {P}aris combined sewer system through a case study on twelve nested subcatchments. {A} two-step methodology is used. {F}irst, the morphometric properties are analysed using the reference {H}orton-{S}trahler, {R}odriguez-{I}turbe and {M}oussa-{B}ocquillon scaling laws. {T}he results show that {H}orton-{S}trahler's laws of bifurcation are verified while the length and area laws are not always verified. {R}odriguez-{I}turbe and {M}oussa-{B}ocquillon laws are verified with slightly different values of the descriptors in comparison to {OCN}s. {S}econd, these morphometric properties are used to calculate four {GIUH}s: the reference {W}idth {F}unction ({GWF}), the {N}ash unit hydrograph ({GN}) using {H}orton-{S}trahler ratios, the {N}ash {U}nit {H}ydrograph equivalent ({GN}e) using {M}oussa-{B}ocquillon descriptors, and the {H}ayami function ({GH}) solution of the diffusive wave equation. {W}e identified four catchments for which the scaling laws are verified and therefore all {GIUH}s are similar while for four other catchments the scaling laws are not verified and strongly impact the {GIUH}s. {T}hese morphometric descriptors and the {GIUH}s can be considered as 'hydrological signatures' of {C}ombined {S}ewer {S}ystems ({CSS}s) and are useful for the comparison and classification of hydrological responses. {T}his work aims to study the morphometric properties of a non-{O}ptimal {C}hannel {N}etwork, the {G}reater {P}aris {C}ombined {S}ewer {S}ystem ({CSS}), through a case study on twelve nested subcatchments. {T}he morphometric properties are analysed using the {H}orton-{S}trahler, {R}odriguez-{I}turbe and {M}oussa {B}ocquillon laws. {T}hese morphometric properties are then used to calculate four {GIUH}s. {T}he morphometric descriptors and the {GIUH}s can be considered as 'hydrological signatures' of {CSS}s and are useful for the comparison and classification of hydrological responses.image},
  keywords = {combined sewer system ({CSS}) ; {GIUH} ; {H}orton-{S}trahler laws ; power law ; urban network ; {FRANCE} ; {PARIS}},
  booktitle = {},
  journal = {{H}ydrological {P}rocesses},
  volume = {37},
  numero = {10},
  pages = {e14984 [20 p.]},
  ISSN = {0885-6087},
  year = {2023},
  DOI = {10.1002/hyp.14984},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090342},
}