A modeling approach for assessing rice cropping cycle affected by flooding, salinity intrusion, and monsoon rains in the Mekong Delta, Vietnam

Akihiko Kotera, Khang Duy Nguyen, Toshihiro Sakamoto, Toshichika Iizumi, Masayuki Yokosawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We developed a crop scheduling model for rice cultivation in the Vietnam Mekong Delta (VMD), focusing on the adaptive behavior of crop planning to various water resource constraints. In addition, we also examined the effects of environmental change on rice cultivation in the last decade. In the VMD, multiple rice cropping is practiced under a variety of adverse water conditions, including flooding, salinity intrusion, and irregular monsoon rains. These environmental changes influence the durations of growing seasons and the number of crops per year, resulting in changes in productivity. To validate the performance of the model, we compared model estimates for the heading date and changes in leaf area index at nine sites with estimates of these parameters derived from MODIS satellite time series data for the period 2002-2006. The root mean square errors of heading date between the modeled and satellite data in the upper, middle, and coastal regions of the delta were 17.6, 11.2, and 13.0 days, respectively. Based on the model, we examined case studies to assess the changes in cropping cycles and crop failures in the VMD due to extreme flooding in 2000 and salinity intrusion in 2004 by applying evaluation indices defined by available period for cultivation (APC) and safe margin for cropping (SMC) which is defined as the marginal time between APC and the period required for cultivation. Findings of case studies suggested that a small difference in the SMC of the cropping pattern is critical to the stability and productive capacity of the rice crop.

Original languageEnglish
Pages (from-to)343-354
Number of pages12
JournalPaddy and Water Environment
Volume12
Issue number3
DOIs
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

Vietnam
Rain
cropping practice
monsoon
rice
flooding
Crops
salinity
rain
crop
crops
modeling
heading
environmental change
case studies
economic productivity
Satellites
moderate resolution imaging spectroradiometer
leaf area index
water resources

Keywords

  • Adaptive behavior
  • Crop calendar
  • Crop failure
  • MODIS
  • Vulnerability

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology
  • Agronomy and Crop Science

Cite this

A modeling approach for assessing rice cropping cycle affected by flooding, salinity intrusion, and monsoon rains in the Mekong Delta, Vietnam. / Kotera, Akihiko; Nguyen, Khang Duy; Sakamoto, Toshihiro; Iizumi, Toshichika; Yokosawa, Masayuki.

In: Paddy and Water Environment, Vol. 12, No. 3, 2014, p. 343-354.

Research output: Contribution to journalArticle

@article{5d008abea8a049e589aa9e3292c0b328,
title = "A modeling approach for assessing rice cropping cycle affected by flooding, salinity intrusion, and monsoon rains in the Mekong Delta, Vietnam",
abstract = "We developed a crop scheduling model for rice cultivation in the Vietnam Mekong Delta (VMD), focusing on the adaptive behavior of crop planning to various water resource constraints. In addition, we also examined the effects of environmental change on rice cultivation in the last decade. In the VMD, multiple rice cropping is practiced under a variety of adverse water conditions, including flooding, salinity intrusion, and irregular monsoon rains. These environmental changes influence the durations of growing seasons and the number of crops per year, resulting in changes in productivity. To validate the performance of the model, we compared model estimates for the heading date and changes in leaf area index at nine sites with estimates of these parameters derived from MODIS satellite time series data for the period 2002-2006. The root mean square errors of heading date between the modeled and satellite data in the upper, middle, and coastal regions of the delta were 17.6, 11.2, and 13.0 days, respectively. Based on the model, we examined case studies to assess the changes in cropping cycles and crop failures in the VMD due to extreme flooding in 2000 and salinity intrusion in 2004 by applying evaluation indices defined by available period for cultivation (APC) and safe margin for cropping (SMC) which is defined as the marginal time between APC and the period required for cultivation. Findings of case studies suggested that a small difference in the SMC of the cropping pattern is critical to the stability and productive capacity of the rice crop.",
keywords = "Adaptive behavior, Crop calendar, Crop failure, MODIS, Vulnerability",
author = "Akihiko Kotera and Nguyen, {Khang Duy} and Toshihiro Sakamoto and Toshichika Iizumi and Masayuki Yokosawa",
year = "2014",
doi = "10.1007/s10333-013-0386-y",
language = "English",
volume = "12",
pages = "343--354",
journal = "Paddy and Water Environment",
issn = "1611-2490",
publisher = "Springer Verlag",
number = "3",

}

TY - JOUR

T1 - A modeling approach for assessing rice cropping cycle affected by flooding, salinity intrusion, and monsoon rains in the Mekong Delta, Vietnam

AU - Kotera, Akihiko

AU - Nguyen, Khang Duy

AU - Sakamoto, Toshihiro

AU - Iizumi, Toshichika

AU - Yokosawa, Masayuki

PY - 2014

Y1 - 2014

N2 - We developed a crop scheduling model for rice cultivation in the Vietnam Mekong Delta (VMD), focusing on the adaptive behavior of crop planning to various water resource constraints. In addition, we also examined the effects of environmental change on rice cultivation in the last decade. In the VMD, multiple rice cropping is practiced under a variety of adverse water conditions, including flooding, salinity intrusion, and irregular monsoon rains. These environmental changes influence the durations of growing seasons and the number of crops per year, resulting in changes in productivity. To validate the performance of the model, we compared model estimates for the heading date and changes in leaf area index at nine sites with estimates of these parameters derived from MODIS satellite time series data for the period 2002-2006. The root mean square errors of heading date between the modeled and satellite data in the upper, middle, and coastal regions of the delta were 17.6, 11.2, and 13.0 days, respectively. Based on the model, we examined case studies to assess the changes in cropping cycles and crop failures in the VMD due to extreme flooding in 2000 and salinity intrusion in 2004 by applying evaluation indices defined by available period for cultivation (APC) and safe margin for cropping (SMC) which is defined as the marginal time between APC and the period required for cultivation. Findings of case studies suggested that a small difference in the SMC of the cropping pattern is critical to the stability and productive capacity of the rice crop.

AB - We developed a crop scheduling model for rice cultivation in the Vietnam Mekong Delta (VMD), focusing on the adaptive behavior of crop planning to various water resource constraints. In addition, we also examined the effects of environmental change on rice cultivation in the last decade. In the VMD, multiple rice cropping is practiced under a variety of adverse water conditions, including flooding, salinity intrusion, and irregular monsoon rains. These environmental changes influence the durations of growing seasons and the number of crops per year, resulting in changes in productivity. To validate the performance of the model, we compared model estimates for the heading date and changes in leaf area index at nine sites with estimates of these parameters derived from MODIS satellite time series data for the period 2002-2006. The root mean square errors of heading date between the modeled and satellite data in the upper, middle, and coastal regions of the delta were 17.6, 11.2, and 13.0 days, respectively. Based on the model, we examined case studies to assess the changes in cropping cycles and crop failures in the VMD due to extreme flooding in 2000 and salinity intrusion in 2004 by applying evaluation indices defined by available period for cultivation (APC) and safe margin for cropping (SMC) which is defined as the marginal time between APC and the period required for cultivation. Findings of case studies suggested that a small difference in the SMC of the cropping pattern is critical to the stability and productive capacity of the rice crop.

KW - Adaptive behavior

KW - Crop calendar

KW - Crop failure

KW - MODIS

KW - Vulnerability

UR - http://www.scopus.com/inward/record.url?scp=84902140960&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84902140960&partnerID=8YFLogxK

U2 - 10.1007/s10333-013-0386-y

DO - 10.1007/s10333-013-0386-y

M3 - Article

AN - SCOPUS:84902140960

VL - 12

SP - 343

EP - 354

JO - Paddy and Water Environment

JF - Paddy and Water Environment

SN - 1611-2490

IS - 3

ER -