異なる地下植生パターンの水力学的パラメータの特徴
Chenhui Zhang1, Jiali Wang1, Jianbo Jia1,2
1College of Soil and Water Conservation, Central South University of Forestry and Technology, Changsha 410004, China.
Plants (Basel, Switzerland)
|August 28, 2025
まとめ
森林の斜面の植生を増加させることで,土壌の浸食を大幅に減らし,流れの安定性を改善します. 高い植生面積 (60-90%) が最も効果的であり,陸上の流れを乱流からラミナールに変換し,土壌と水の保全の努力を助けます.
科学分野:
- 環境科学
- 土壌科学
- 水学
背景:
- 地下植生は,斜面スケールの土壌と水の保全に大きな影響を与えます.
- 植物の覆いは水力学的特性,流出,沈殿物の生成プロセスに影響する.
研究 の 目的:
- 流出-沈殿過程と水力学的パラメータの反応を,異なる植生種と覆面下で評価する.
- 森林の斜面での土壌浸食を緩和する際の,異なる植生パターンと覆いの有効性を評価する.
主な方法:
- 森林の斜面で様々な強度 (45-120 mm·h−1) の降雨をシミュレートした実験.
- 異なる植生面積 (30%,60%,90%) とパターン (CとD) の実施
- 流れ出力,レイノルズ数,抵抗係数,流れ速度などの水力学的パラメータの分析.
主要な成果:
- 植物の覆いが増加し,土壌侵食が著しく減少した (p < 0.05).
- 植生パターンのCとDは,60〜90%のカバーで,侵食を抑制し,流れの安定性を高めるのに最も効果的でした.
- 高い植生層は陸上の流れを 乱流からラミナールに変化させ 流れの速度と水深を減少させました
結論:
- レイノルズ数と流出力は 赤い土壌の斜面での侵食を誘発する 主要な要因です
- 流出口付近の部分的な植生と高い覆い (60-90%) は,土壌の侵食を効果的に軽減します.
- 丘陵地帯での土壌と水の保全戦略を最適化するための理論的支援を提供している.
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