Streamflow Estimation Using Regionalized Hydrometeorological Assessment on Associated Ungauged Small Watershed: A Case Study at West Nusa Tenggara Province

DOI

10.2991/aer.k.211106.018How to use a DOI?

Keywords

Regionalized analysis; Ungauged watershed; Satellite data; Streamflow estimation

Abstract

Small watershed has a quick response of both meteorological and hydrological variables which led to the critical impact of discharges, especially for a small island. However, the watershed generally has lacked ground observation data. Thus, many engineers and scientists have used the geostationary satellite to develop a continuous data observation, such as Tropical Rainfall Measuring Mission (TRMM) and recently Global Precipitation Measurement (GPM). Unfortunately, the environmental factor could generate anomalies for the satellite sensor data; hence, hydrological characteristics for the small island are varied. Therefore, several calibrations using ground stations data are necessary to provide reliable results. This paper proposes a regionalized hydrometeorological assessment for streamflow prediction on ungauged small watersheds at part of Sumbawa Island, Nusa Tenggara Barat province, Indonesia. First, a block of satellite data is developed which covered ungauged watersheds, ground rainfall stations, and Automatic Water Level Recorder (AWLR) station. Next, an analysis of topography, land cover, and soil types are developed to identify homogenous hydrology factors of watersheds. After several corrections on daily rainfall data using the reliable ground station on homogenous meteorological conditions are done, the discharge will be calibrated using water level data from another gauged watershed for developing hydrology variable references. Values of coefficient of correlation were ≥ 0.60 during the correction, validation, and calibration phases. Based on this assessment, the regionalized hydrometeorological shows a satisfactory result on the small watershed for the streamflow estimation. This assessment is important for managing ungauged watersheds in an uncertain climate, especially for developing a reliable discharge for the infrastructure utilization.

Copyright

© 2021 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Dian Indrawati
AU  - Auroop R. Ganguly
AU  - Kemal Taruc
AU  - Bagus Yakti
PY  - 2021
DA  - 2021/11/23
TI  - Streamflow Estimation Using Regionalized Hydrometeorological Assessment on Associated Ungauged Small Watershed: A Case Study at West Nusa Tenggara Province
BT  - Proceedings of the 2nd International Seminar of Science and Applied Technology (ISSAT 2021)
PB  - Atlantis Press
SP  - 109
EP  - 114
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.211106.018
DO  - 10.2991/aer.k.211106.018
ID  - Indrawati2021
ER  -