💧Watershed Analysis

Fig 1:

Domain area with river network

Fig 2:

Domain area summary statistics

Fig 3:

Current land cover breakdown by type (2019)

Fig 4

Temporal trend in annual and seasonal average rainfall, with extreme event classifications represented by distinct colors. The black line connects individual annual rainfall values, while the dashed red line represents a linear regression trend, with the gray shaded region indicating the confidence interval. Points are color-coded to reflect different extreme event types, including isolated dry and wet years, persistent dry and wet periods, and transition events (wet-to-dry and dry-to-wet).

Yearly Data

Winter

Spring

Summer

Fall

Summary Table

Fig 5

Temporal distribution of hydroclimatic extreme events per pixel within the TargetDomain. The bars represent the proportion of the watershed experiencing different extreme event types each year and each season. Positive values (above the zero line) correspond to wet-related events, while negative values (below the zero line) correspond to dry-related events.

Yearly Data

Winter

Spring

Summer

Fall

Fig 6

Decadal trends for annual and seasonal data in normalized hydro climatic extreme events within the watershed. The stacked bars represent the average number of extreme events per decade, with wet-related events shown above the zero line and dry-related events below.

Yearly Data

Winter

Spring

Summer

Fall

Fig 7

3 years, 5 years and ten-years moving average of precipitation percentiles in the (TargetDomain) from 1895 to the present. The moving average was computed using rolling window to smooth interannual variability and highlight long-term trends. The red dashed line represents the 20th percentile threshold, indicating dry conditions, while the blue dashed line represents the 80th percentile threshold, indicating wet conditions. Periods where the moving average crosses these thresholds suggest prolonged wet or dry phases.

Fig 8

Proportion of dry and wet extreme events per decade in the Eastern Kansas River Basin (TargetDomain) from 1900 to 2019. The bars represent the proportion of extreme events classified as dry (red) and wet (blue) in each decade. The classification of each decade into “Persistent Dry,” “Persistent Wet,” or “Mixed” regimes is indicated at the top of the figure, based on the dominance of extreme events (≥60% wet or dry). The results highlight decadal-scale variability in hydro climatic extremes, with shifts between prolonged dry and wet periods over time.

Fig 9

Trends in corn and soybean cultivation area (in pixels or hectares) from 2008 to 2023, overlaid with extreme precipitation events in the Eastern Kansas River Basin (TargetDomain). Cropland data was obtained from the Cropland Data Layer (CDL) and aggregated by year. Extreme precipitation events were classified based on annual precipitation percentiles, with transitions between dry and wet periods categorized as dry-to-wet (dry2wet), wet-to-dry (wet2dry), and persistent extremes (dry2dry, wet2wet). The lines represent the total cultivated area for corn (blue) and soybeans (green), while points indicate years with specific extreme events.