An Improvement in the BBH Model for Estimating Evapotranspiration from Cornfields in the Upper Yellow River

Tetsuo Kobayashi, Daisuke Yasutake, Jun'ichi Teshima, Risa Iwanaga, Daichi Ikegami, Wenjun He, Hiroyuki Cho

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The bucket with a bottom hole (BBH) model of soil hydrology was improved to incorporate bioprocesses such as surface rainfall interception and macropore flow into it by introducing three model parameters or two composite parameters. The improved model (BBH-B model) was applied to the estimation of evapotranspiration (ET) from a cornfield in the upper Yellow River. The results obtained are summarized as follows. (a) Estimates of the cumulative ET during periods of about one month were made using the BBH-B model with fair accuracy if the model parameters could be evaluated appropriately. (b) ET had a large spatial variation within the cornfield. (c) The major zone of water use by corn moved downward through the soil as the growing season progressed. The ratio of root water uptake in depths between 40 cm and 100 cm to ET increased from about one-forth in June, when LAI increased quickly, to about one-half in September, when the corn maturred. (d) The surface conditions, such as the fraction of crop cover, exerted a large influence on the partition of rainwater at the surface of the cornfield.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
Journaljournal of agricultural meteorology
Volume63
Issue number1
DOIs
Publication statusPublished - Sep 1 2007

Fingerprint

Yellow River
evapotranspiration
river
maize
macropore flow
rain
buckets
corn
cover crop
macropore
water uptake
interception
cover crops
rainwater
leaf area index
hydrology
water use
spatial variation
soil
growing season

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Atmospheric Science

Cite this

An Improvement in the BBH Model for Estimating Evapotranspiration from Cornfields in the Upper Yellow River. / Kobayashi, Tetsuo; Yasutake, Daisuke; Teshima, Jun'ichi; Iwanaga, Risa; Ikegami, Daichi; He, Wenjun; Cho, Hiroyuki.

In: journal of agricultural meteorology, Vol. 63, No. 1, 01.09.2007, p. 1-10.

Research output: Contribution to journalArticle

Kobayashi, Tetsuo ; Yasutake, Daisuke ; Teshima, Jun'ichi ; Iwanaga, Risa ; Ikegami, Daichi ; He, Wenjun ; Cho, Hiroyuki. / An Improvement in the BBH Model for Estimating Evapotranspiration from Cornfields in the Upper Yellow River. In: journal of agricultural meteorology. 2007 ; Vol. 63, No. 1. pp. 1-10.
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