Repository logo
  • English
  • Català
  • ÄŒeÅ¡tina
  • Deutsch
  • Español
  • Français
  • Gàidhlig
  • Italiano
  • LatvieÅ¡u
  • Magyar
  • Nederlands
  • Polski
  • Português
  • Português do Brasil
  • Srpski (lat)
  • Suomi
  • Svenska
  • Türkçe
  • Tiếng Việt
  • Log In
    New user? Click here to register. Have you forgotten your password?
Repository logo
    Communities & Collections
    All of DSpace
  • English
  • Català
  • ÄŒeÅ¡tina
  • Deutsch
  • Español
  • Français
  • Gàidhlig
  • Italiano
  • LatvieÅ¡u
  • Magyar
  • Nederlands
  • Polski
  • Português
  • Português do Brasil
  • Srpski (lat)
  • Suomi
  • Svenska
  • Türkçe
  • Tiếng Việt
  • Log In
    New user? Click here to register. Have you forgotten your password?
  1. Home
  2. Browse by Author

Browsing by Author "Juma, Kashinde Abdalla"

Now showing 1 - 1 of 1
Results Per Page
Sort Options
  • Loading...
    Thumbnail Image
    Item
    Sensitivity analysis and auto calibration using swat model: a case study of 1dd1 Catchment
    (University of Dar es Salaam, 2006) Juma, Kashinde Abdalla
    A complex hydrologic model is generally characterized by a multitude of parameters. The success of a manual calibration essentially depends on the experience of the modeler and their knowledge of the basic approaches and interactions in the moreover, it can be extremely time consuming. Parameters identifiability was conducted using Sensitivity analysis based on sampling strategy that is a combination of Latin-Hypercube and one-factor-at a-time sampling which built-in a physically based model SWAT. An automatic calibration based on SCE-UA which is incorporated into SWAT model, was used for parameter optimization. Available daily streamflow data for six years (i.e. 1977-1982) and four years (i.e. 1970-1973) were used for model calibration and validation respectively. The sensitivity analysis has identified six (6) most sensitive parameters. Such parameters are Curve Number (CN2), Surface Runoff lag time(Surlag), minimum threshold depth of water for ground flow to occur(GWQMN), Recharge to deep aquifer (RCHRG-DP), Overland Slope (SLOPE), and Soil depth (SOL-Z). Besides, it was found that surface runoff parameters are mostly influencing rainfall-runoff transformation in the catchment. Calibration and validation on a daily basis gave satisfactory results with Nash-Sutcliffe coefficient of efficiency R^2 = 54% and R^2=64% respectively. The model performance on monthly basis during one hydrological year gave up to R^2= 77%. The modeling exercise has suggested that using processed or adequate and reliable spatial rainfall data and setting up a distributed watershed model could improve the results of this study.

About Library

The University of Dar es Salaam Library is a vital source of scholarly information that facilitates users to get access to learning and research resources during their studies. It provides access to a wide range of resources in both print and digital formats and conducive reading environment for users, regardless of their physical conditions. All registered users are eligible to access library resources and can borrow print materials from general shelves for a specific period of time.

Useful Links

Koha Staff Login

University Research Repository

WebMail

Aris

Book Study Room

Mara Oral History

Hansard

SOCIAL MEDIA

Instagram

Facebook

Twitter

YouTube

WhatsApp

Ask Librarian

Contact Us

Postal Address
P.O.Box 35092
Dar es Salaam

Call Us: +255 22 2410500/9 Ext. 2165 ; Direct line +255 22 2410241

Fax No:: +255 22 2410241

Email:: directorlibrary@udsm.ac.tz

2025 University of Dar es Salaam - University Of Dar Es Salaam Library
Term of use / Privacy Policy