Accurate crop-specific damage assessment immediately after flood events is crucial for grain pricing, food policy, and agricultural trade. The main goal of this research is to estimate the crop-specific damage that occurs immediately after flood events by using a newly developed Disaster Vegetation Damage Index (DVDI). By incorporating the DVDI along with information on crop types and flood inundation extents, this research assessed crop damage for three case-study events: Iowa Severe Storms and Flooding (DR 4386), Nebraska Severe Storms and Flooding (DR 4387), and Texas Severe Storms and Flooding (DR 4272). Crop damage is assessed on a qualitative scale and reported at the county level for the selected flood cases in Iowa, Nebraska, and Texas. More than half of flooded corn has experienced no damage, whereas 60% of affected soybean has a higher degree of loss in most of the selected counties in Iowa. Similarly, a total of 350 ha of soybean has moderate to severe damage whereas corn has a negligible impact in Cuming, which is the most affected county in Nebraska. A total of 454 ha of corn are severely damaged in Anderson County, Texas. More than 200 ha of alfalfa have moderate to severe damage in Navarro County, Texas. The results of damage assessment are validated through the NDVI profile and yield loss in percentage. A linear relation is found between DVDI values and crop yield loss. An R² value of 0.54 indicates the potentiality of DVDI for rapid crop damage estimation. The results also indicate the association between DVDI class and crop yield loss.

洪水发生后立即对作物造成的具体损失进行准确的评估对于谷物价格，粮食政策和农产品贸易至关重要。这项研究的主要目的是通过使用新开发的灾难植被破坏指数（DVDI）来评估洪水发生后立即发生的特定作物的破坏。通过结合DVDI以及有关作物类型和洪水泛滥程度的信息，这项研究评估了三个案例研究事件对作物的损害：爱荷华州严重风暴和洪水（DR 4386），内布拉斯加州严重风暴和洪水（DR 4387）和德克萨斯州严重风暴与洪水（DR 4272）。对农作物的损害进行定性评估，并在爱荷华州，内布拉斯加州和得克萨斯州的选定洪水案例中，在县一级进行报告。一半以上的水淹玉米没有遭受破坏，而在爱荷华州的大多数选定县中，受影响的大豆中有60％的损失程度更高。同样，总共350公顷的大豆对中度至重度破坏，而玉米对内布拉斯加州受影响最大的县Cuming的影响可忽略不计。在德克萨斯州安德森县，总共有454公顷的玉米受到严重破坏。在得克萨斯州纳瓦罗县，超过200公顷的苜蓿遭受了中度至重度破坏。损害评估的结果通过NDVI配置文件和产量损失百分比进行了验证。在DVDI值与作物产量损失之间发现线性关系。R 在德克萨斯州安德森县，总共有454公顷的玉米受到严重破坏。在得克萨斯州纳瓦罗县，超过200公顷的苜蓿遭受了中度至重度破坏。损害评估的结果通过NDVI配置文件和产量损失百分比进行了验证。在DVDI值与作物产量损失之间发现线性关系。R 在德克萨斯州安德森县，总共有454公顷的玉米受到严重破坏。在得克萨斯州纳瓦罗县，超过200公顷的苜蓿遭受了中度至重度破坏。损害评估的结果通过NDVI配置文件和产量损失百分比进行了验证。在DVDI值与作物产量损失之间发现线性关系。R²值0.54表示DVDI可能用于快速估计作物受损。结果还表明DVDI等级与农作物减产之间的关联。