PMID- 28448927
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180315
LR  - 20180315
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 598
DP  - 2017 Nov 15
TI  - Time-varying sensitivity analysis of hydrologic and sediment parameters at 
      multiple timescales: Implications for conservation practices.
PG  - 353-364
LID - S0048-9697(17)30911-7 [pii]
LID - 10.1016/j.scitotenv.2017.04.074 [doi]
AB  - Environmental models can be used to better understand the hydrologic and sediment 
      behavior in a watershed system. However, different processes may dominate at 
      different time periods and timescales, which highly complicate the model 
      interpretation. The related parameter uncertainty may be significant and needs to 
      be addressed to avoid bias in the watershed management. In this study, we used 
      the time-varying and multi-timescale (TVMT) method to characterize the temporal 
      dynamics of parameter sensitivity at different timescales in hydrologic and 
      sediment modeling. As a case study, the first order sensitivity indices were 
      estimated with the Fourier amplitude sensitivity test (FAST) method for the 
      Hydrological Simulation Program - Fortran (HSPF) model in the Zhangjiachong 
      catchment in the Three Gorge Reservoir Region (TGRR) in China. The results were 
      compared to those of the traditional aggregate method to demonstrate the merits 
      of the TVMT method. The time-varying nature of the hydrologic and sediment 
      parameters was revealed and explained mainly by the variation of hydro-climatic 
      conditions. The baseflow recession parameter, evapotranspiration (ET) parameter 
      for the soil storage, and sediment washoff parameter showed high sensitivities 
      almost across the whole period. However, parameters related to canopy 
      interception and channel sediment scour varied notably over time due to changes 
      in the climate forcing. The timescale-dependent characteristics was observed and 
      was most evident for the baseflow recession parameter and ET parameter. At last, 
      the parameters affecting the sediment export and transport were discussed 
      together with the inferred conservation practices. Reasonable controls for 
      sediment must be storm-dependent. Compared to management practices on the land 
      surface, practices affecting channel process would be more effective during storm 
      events. Our results present one of the first investigations for sediment modeling 
      in terms of the importance of parameter sensitivity in both time periods and 
      evaluation timescales for the model calibration, diagnostic evaluation, and 
      prioritizing efforts for conservation practices.
CI  - Copyright (c) 2017 Elsevier B.V. All rights reserved.
FAU - Xie, Hui
AU  - Xie H
AD  - State Key Laboratory of Water Environment, School of Environment, Beijing Normal 
      University, Beijing 100875, China. Electronic address: ivyshea@mail.bnu.edu.cn.
FAU - Shen, Zhenyao
AU  - Shen Z
AD  - State Key Laboratory of Water Environment, School of Environment, Beijing Normal 
      University, Beijing 100875, China. Electronic address: zyshen@bnu.edu.cn.
FAU - Chen, Lei
AU  - Chen L
AD  - State Key Laboratory of Water Environment, School of Environment, Beijing Normal 
      University, Beijing 100875, China.
FAU - Qiu, Jiali
AU  - Qiu J
AD  - State Key Laboratory of Water Environment, School of Environment, Beijing Normal 
      University, Beijing 100875, China.
FAU - Dong, Jianwei
AU  - Dong J
AD  - State Key Laboratory of Water Environment, School of Environment, Beijing Normal 
      University, Beijing 100875, China.
LA  - eng
PT  - Journal Article
DEP - 20170424
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
OTO - NOTNLM
OT  - Best management practices
OT  - Hydrological Simulation Program - Fortran
OT  - Moving window
OT  - Scale-dependent
OT  - Temporal sensitivity
OT  - Three Gorge Reservoir Region
EDAT- 2017/04/28 06:00
MHDA- 2017/04/28 06:01
CRDT- 2017/04/28 06:00
PHST- 2016/12/25 00:00 [received]
PHST- 2017/04/07 00:00 [revised]
PHST- 2017/04/09 00:00 [accepted]
PHST- 2017/04/28 06:00 [pubmed]
PHST- 2017/04/28 06:01 [medline]
PHST- 2017/04/28 06:00 [entrez]
AID - S0048-9697(17)30911-7 [pii]
AID - 10.1016/j.scitotenv.2017.04.074 [doi]
PST - ppublish
SO  - Sci Total Environ. 2017 Nov 15;598:353-364. doi: 10.1016/j.scitotenv.2017.04.074. 
      Epub 2017 Apr 24.