Abstract
Due to the recent regulation of rice production in Japan, it has become necessary to convert rice paddy to other field crops production. To achieve this, drainage conditions, especially for surface drainage, must be improved. We propose the introduction of a slight slope to improve surface drainage, but the optimal slope must be determined in order to prevent soil erosion caused by excessive slope, as well as increased cost. In Japan, a 0.1% slope has recently come into widespread use and, therefore, the impact on surface drainage must be quantified. In this report, observations were carried out to quantify the impact of a 0.1% slope for converted rice paddy and the following results were obtained: (1) An approximate 0.1% slope enables improvement of 46% of the soil surface saturation area as compared to flat conditions about 10 h after inundation; and (2) Inundated water remains on a flat field, while it moves downward toward the end on a sloped field. These results give a basis for determining a slope on a rice paddy in terms of surface drainage improvement. However, the optimal slope should be decided from various perspectives including engineering, agronomy, and economics etc.
| Original language | English |
|---|---|
| Pages (from-to) | 165-170 |
| Number of pages | 6 |
| Journal | Paddy and Water Environment |
| Volume | 3 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Sep 2005 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Agronomy and Crop Science
Cite this
Effect of slope on surface drainage in converted rice paddy. / Shinogi, Yoshiyuki; Kanri, Yutaka; Hirose, Yuichi; Inoue, Kaneto.
In: Paddy and Water Environment, Vol. 3, No. 3, 09.2005, p. 165-170.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of slope on surface drainage in converted rice paddy
AU - Shinogi, Yoshiyuki
AU - Kanri, Yutaka
AU - Hirose, Yuichi
AU - Inoue, Kaneto
PY - 2005/9
Y1 - 2005/9
N2 - Due to the recent regulation of rice production in Japan, it has become necessary to convert rice paddy to other field crops production. To achieve this, drainage conditions, especially for surface drainage, must be improved. We propose the introduction of a slight slope to improve surface drainage, but the optimal slope must be determined in order to prevent soil erosion caused by excessive slope, as well as increased cost. In Japan, a 0.1% slope has recently come into widespread use and, therefore, the impact on surface drainage must be quantified. In this report, observations were carried out to quantify the impact of a 0.1% slope for converted rice paddy and the following results were obtained: (1) An approximate 0.1% slope enables improvement of 46% of the soil surface saturation area as compared to flat conditions about 10 h after inundation; and (2) Inundated water remains on a flat field, while it moves downward toward the end on a sloped field. These results give a basis for determining a slope on a rice paddy in terms of surface drainage improvement. However, the optimal slope should be decided from various perspectives including engineering, agronomy, and economics etc.
AB - Due to the recent regulation of rice production in Japan, it has become necessary to convert rice paddy to other field crops production. To achieve this, drainage conditions, especially for surface drainage, must be improved. We propose the introduction of a slight slope to improve surface drainage, but the optimal slope must be determined in order to prevent soil erosion caused by excessive slope, as well as increased cost. In Japan, a 0.1% slope has recently come into widespread use and, therefore, the impact on surface drainage must be quantified. In this report, observations were carried out to quantify the impact of a 0.1% slope for converted rice paddy and the following results were obtained: (1) An approximate 0.1% slope enables improvement of 46% of the soil surface saturation area as compared to flat conditions about 10 h after inundation; and (2) Inundated water remains on a flat field, while it moves downward toward the end on a sloped field. These results give a basis for determining a slope on a rice paddy in terms of surface drainage improvement. However, the optimal slope should be decided from various perspectives including engineering, agronomy, and economics etc.
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UR - http://www.scopus.com/inward/citedby.url?scp=27744571000&partnerID=8YFLogxK
U2 - 10.1007/s10333-005-0013-7
DO - 10.1007/s10333-005-0013-7
M3 - Article
AN - SCOPUS:27744571000
VL - 3
SP - 165
EP - 170
JO - Paddy and Water Environment
JF - Paddy and Water Environment
SN - 1611-2490
IS - 3
ER -