Conservation planning processes and wetland management require spatial estimations of aquatic habitats to support the maintenance of aquatic biodiversity. However, physical access to several wetlands and freshwater habitats can be restricted due to difficult topography and technological limitations associated with ground-based observations. In addition to these constraints, the distribution of some aquatic primary producers in freshwater habitats and floodplains that are difficult to reach further complicates large-scale assessment of aquatic habitats using traditional field-based techniques. The main objective of this study is to predict the spatial distribution of hot spots of primary producers (aquatic plant biomass) and assess large-scale inundation patterns in a large floodplain wetland (Flinders catchment) in the wet-dry tropics of Australia. To this end, remote sensing biophysical indicators (vegetation and inundation) were integrated with flood water depth in a classification tree model. Results indicate that in terms of floodplain total inundation, the Flinders wetland hydrology is rather restricted immediately after the summer wet season, the period when most primary production happens. While this can be attributed to the fact that much of the observed annual variability (93%) in rainfall and surface runoff (95%) occur during the wet season, post flood recession patterns are indicators that underpin the somewhat limited alimentation of the Flinders floodplain during this period. As observed in this study, post flood inundation extents in the summers of 2009 and 2019 declined by approximately 89% and 87% within fourteen and ten days, respectively. Despite having a significantly higher magnitude than the 2009 summer flood event, the 2019 extreme ‘big wet’ period did not translate to higher floodplain productivity (aquatic plant biomass and surface water distribution) immediately after summer as was the case in 2009. Furthermore, the predicted extents of aquatic plant biomass and total floodplain inundation in the downstream Flinders show substantial temporal variation and suggest the floodplain wetland hydrology is largely driven by inter-annual changes in annual rainfall. The extents of these hot spots of biomass accumulation were found to be considerably associated with total floodplain inundation extent ($r=0.94$), rainfall ($r=0.81$), and discharge ($r=0.68$). Furthermore, advance statistical analyses show that downstream discharge and rainfall over the Flinders are significantly correlated ($r=0.72$). In addition to this, observed amplitudes of discharge and rainfall in extreme wet and dry years coincided with floodplain inundation patterns and distribution of hot spots of primary producers. While these relationships emphasize the importance of flow in the nourishment of the downstream catchment, they further corroborate the composite influence of local rainfall and discharge on total floodplain inundation and hot spots of primary producers.

保护规划过程和湿地管理要求对水生生境进行空间估算，以支持维持水生生物多样性。但是，由于地形困难和与地面观测有关的技术限制，可能难以进入几个湿地和淡水生境。除这些限制外，一些水生初级生产者在淡水生境和洪泛区中的分布难以达到，这使使用传统的基于现场的技术对水生生境进行大规模评估变得更加复杂。这项研究的主要目的是预测澳大利亚湿地-热带地区一个主要洪泛区湿地（Flinders流域）中主要生产者（水生植物生物量）热点的空间分布，并评估其大规模淹没方式。为此，在分类树模型中将遥感生物物理指标（植被和淹没）与洪水深度相结合。结果表明，就泛滥平原的总淹没而言，弗林德斯湿地的水文状况在夏季雨季（大部分初级生产发生的时期）后立即受到限制。尽管这可以归因于以下事实：在降雨和地表径流（95％）中观察到的许多年变化（93％）发生在湿季，但洪水后的衰退模式是支撑弗林德斯河漫滩的有限有限营养的指标在这段时期。如本研究所示，2009年和2019年夏季的洪水泛滥程度分别在14天和10天之内下降了约89％和87％。尽管其震级比2009年夏季洪灾高得多，但2019年极端``大湿润''期并没有像2009年夏季那样立即转化为洪泛区生产力（水生植物生物量和地表水分布）的提高。下游弗林德斯州的水生植物生物量和洪泛区总淹没的预测范围显示出较大的时间变化，这表明洪泛区湿地水文学在很大程度上是由年降水量的年际变化驱动的。发现这些生物量积累热点的程度与洪泛区总淹没程度有很大关系（与2009年一样，2019年的极端“大湿润”期并没有像夏季之后那样立即转化为较高的洪泛区生产力（水生植物生物量和地表水分布）。此外，预计的水生植物生物量和下游洪泛区总淹没的程度碎片显示出巨大的时间变化，表明洪泛区湿地水文学在很大程度上是由年降水量的年际变化驱动的。发现这些生物量积累热点的程度与洪泛区总淹没程度有很大关系（与2009年一样，2019年的极端“大湿润”期并没有像夏季之后那样立即转化为较高的洪泛区生产力（水生植物生物量和地表水分布）。此外，预计的水生植物生物量和下游洪泛区总淹没的程度碎片显示出巨大的时间变化，表明洪泛区湿地水文学在很大程度上是由年降水量的年际变化驱动的。发现这些生物量积累热点的程度与洪泛区的总淹没程度有很大关系（下游弗林德斯州的水生植物生物量和洪泛区总淹没的预测程度显示出较大的时间变化，表明洪泛区湿地水文学在很大程度上是由年降水量的年际变化驱动的。发现这些生物量积累热点的程度与洪泛区的总淹没程度有很大关系（下游弗林德斯州的水生植物生物量和洪泛区总淹没的预测程度显示出较大的时间变化，表明洪泛区湿地水文学在很大程度上是由年降水量的年际变化驱动的。发现这些生物量积累热点的程度与洪泛区总淹没程度有很大关系（$\mathrm{[R}=0.94$），降雨（$\mathrm{[R}=0.81$），然后放电（$\mathrm{[R}=0.68$）。此外，预先的统计分析表明，弗林德斯河下游的排放量和降雨量之间存在显着的相关性（$\mathrm{[R}=0.72$）。除此之外，在极端干湿年份观测到的排放量和降雨幅度与洪泛区淹没模式和初级生产者的热点分布相吻合。这些关系虽然强调了下游集水区养分中流量的重要性，但它们进一步证实了当地降雨和流量对洪泛区总淹没和初级生产者热点的综合影响。