在详细的空间模式中评估预算,使用高精度建模方法,并构建精确的农业行为
Kunyang Wang1, Shin-Ichi Onodera1, Mitsuyo Saito1
1Graduate School of Advanced Science and Engineering, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521, Japan.
The Science of the total environment
|December 29, 2023
概括
肥料的使用破坏了循环,造成了污染. 这项研究引入了一种新的模型,用于准确评估农业水域的预算,识别关键污染源.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 水文学的水文学
背景情况:
- 肥料引起的循环变化导致严重的环境污染,特别是地下水污染.
- 由于方法的局限性,准确评估农业水域的气预算和地下水污染是具有挑战性的.
研究的目的:
- 开发和验证一种新的建模方法,用于在农业水域中高空间精度评估气预算.
- 通过整合新的数据源和模型输出来提高气预算评估的准确性.
主要方法:
- 使用了修订后的土壤和水评估工具 (SWAT) 模型,将河流营养度和氨气挥发率纳入其中.
- 模型的校准和验证是使用作物收获,水蒸发 (来自Landsat数据),溪流和河水度进行的.
主要成果:
- 从大米田中出被确定为主要贡献者 (65%),总计42公斤/公.
- 特定的土壤类型 (Cambisols,Fluvic Gleysols) 和低坡地区对脱和泄漏的敏感性更高.
- 高空间精度分析显示,严重的地表水污染和潜在的地下水污染之间存在相关性.
结论:
- 开发的建模方法为评估采集区规模的气预算和地下水污染提供了更高的准确性.
- 这些发现强调了大米田和特定景观特征在污染动态中的关键作用.
- 这项研究为管理农业对水资源的影响提供了有价值的见解.
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