Siwei He

Research Areas

I had successfully run a series of models, such as TOPMODEL, Xi'anjiang model, Sacromento model (SAC), Hydrologiska Byrans Vattenbalansavdelning (HBV) model, CESM1.0, Noah LSM, LPJ, Biome-BGC, Variable Infiltration Capacity (VIC) model, among them, VIC is my focus. My work mainly contains the following aspects.

  1. Integrating Noah LSM and Biome-BGC model.

    2. Soil organic matter plays an import role in the process of water and heat conduction. Moreover, the leaf area index (LAI) is also very important in the process of energy and water exchange in earth surface. I took these two elements into account in Noah LSM by integrating Biome-BGC with Noah.

  2. Development of a novel approach to evaluate the accuracy of two precipitation datasets.

    3. This approach includes multiple statistical metrics, multiple time scales, and wavelet transform and was applied to assess the accuracy of ITP and GLDAS precipitation data over the upper reach of Heihe River Basin. The proposed method in this study features four remarkable highlights: (1) including frequently-used metrics in evaluating precipitation data accuracy, (2) adopting three weather forecasting indicators, (3) Introducing wavelet transform, and (4) evaluating both magnitude and pattern of spatial distribution.

  3. Runoff complexity analysis with multiscale entropy method.

    4. Multiscale entropy method is a kind of nonlinear dynamic analysis method. It can investigate the complexity of time series at different scales, thus the result maybe more credible than traditional complexity measure methods.

  4. Investigating adaptability of VIC model in mountainous region.

    5. In this model, land surface is modeled as a grid of large, flat and uniform cells. It has been proved that VIC model have good performance on relativity flat ones. Although the subgrid variability of some variables has been taken into consideration in VIC model, there are still some variables that do not take subgrid variability into account. I chose a research area that located in mountainous region and had investigated whether or not errors will be produced or how large errors will be produced based on those hypotheses.

Attending Meetings

  1. Aug. 2009, Proceedings of the 9th National Congress on Hydrodynamics and 22th Conference on Hydrodynamics, Organised by Sichuan University.
  2. Apr. 2010, National Forum for Graduate Students of Water Conservancy Engineering, Organised by Wuhan University.

Projects

  1. Research on Photometric Characteristics of High-velocity Aerated Flow by CCD, (2008.10-2009.12, National Undergraduate Innovative Test Program (NUITP), project number 081070021) Main accomplisher.
    2. .
  2. A Decision Support System that is Based on Scientific Model and 3D Game Experience for Sustainable Development of Land and Water Resource in Heihe River Basin (HRB). (2008.6-2011.5, 863 High Technology Research & Development Project of China, project number 2008AA12Z205) Participant.
  3. An Integrated Watershed Management Spatial Decision Support System (SDSS) Service for Heihe River Basin (HRB) (2012.1-2014.12, Natural Science Foundation of China (NSFC), project number 91125006) Participant.