diff --git a/client/src/components/dataset-card/index.tsx b/client/src/components/dataset-card/index.tsx
index 2f005e3..168811a 100644
--- a/client/src/components/dataset-card/index.tsx
+++ b/client/src/components/dataset-card/index.tsx
@@ -14,6 +14,8 @@ import { Switch } from "@/components/ui/switch";
 import useMapLayers from "@/hooks/use-map-layers";
 import { DatasetLayersDataItem } from "@/types/generated/strapi.schemas";
 
+import { getDefaultReturnPeriod, getDefaultSelectedLayerId, getReturnPeriods } from "./utils";
+
 interface DatasetCardProps {
   id: number;
   name: string;
@@ -24,22 +26,18 @@ interface DatasetCardProps {
 const DatasetCard = ({ id, name, defaultLayerId, layers }: DatasetCardProps) => {
   const [layersConfiguration, { addLayer, updateLayer, removeLayer }] = useMapLayers();
 
-  const defaultSelectedLayerId = useMemo(() => {
-    // The ids of the layers that belong to the dataset
-    const datasetLayerIds = layers.map(({ id }) => id!);
-    // The ids of the layers active on the map, probably not from this dataset
-    const activeLayerIds = layersConfiguration.map(({ id }) => id!);
-    // The id of the layer that belongs to the dataset and is active, if any
-    const activeDatasetLayerId = datasetLayerIds.find((id) => activeLayerIds.includes(id));
-
-    if (activeDatasetLayerId) {
-      return activeDatasetLayerId;
-    }
+  const defaultSelectedLayerId = useMemo(
+    () => getDefaultSelectedLayerId(defaultLayerId, layers, layersConfiguration),
+    [layers, defaultLayerId, layersConfiguration],
+  );
 
-    return defaultLayerId;
-  }, [layers, defaultLayerId, layersConfiguration]);
+  const defaultSelectedReturnPeriod = useMemo(
+    () => getDefaultReturnPeriod(defaultSelectedLayerId, layers, layersConfiguration),
+    [layers, layersConfiguration, defaultSelectedLayerId],
+  );
 
   const [selectedLayerId, setSelectedLayerId] = useState(defaultSelectedLayerId);
+  const [selectedReturnPeriod, setSelectedReturnPeriod] = useState(defaultSelectedReturnPeriod);
 
   const isDatasetActive = useMemo(() => {
     if (selectedLayerId === undefined) {
@@ -49,6 +47,11 @@ const DatasetCard = ({ id, name, defaultLayerId, layers }: DatasetCardProps) =>
     return layersConfiguration.findIndex(({ id }) => id === selectedLayerId) !== -1;
   }, [selectedLayerId, layersConfiguration]);
 
+  const layerReturnPeriods = useMemo(
+    () => getReturnPeriods(selectedLayerId, layers),
+    [layers, selectedLayerId],
+  );
+
   const onToggleDataset = useCallback(
     (active: boolean) => {
       if (selectedLayerId === undefined) {
@@ -58,25 +61,48 @@ const DatasetCard = ({ id, name, defaultLayerId, layers }: DatasetCardProps) =>
       if (!active) {
         removeLayer(selectedLayerId);
       } else {
-        addLayer(selectedLayerId);
+        addLayer(selectedLayerId, { ["return-period"]: selectedReturnPeriod });
       }
     },
-    [selectedLayerId, addLayer, removeLayer],
+    [selectedLayerId, addLayer, removeLayer, selectedReturnPeriod],
   );
 
   const onChangeSelectedLayer = useCallback(
     (stringId: string) => {
       const id = Number.parseInt(stringId);
       const previousId = selectedLayerId;
+      const returnPeriod = getDefaultReturnPeriod(id, layers, layersConfiguration);
 
       setSelectedLayerId(id);
+      setSelectedReturnPeriod(returnPeriod);
+
       // If the dataset was active and the layer is changed, we replace the current layer by the new
       // one keeping all the same settings (visibility, opacity, etc.)
       if (isDatasetActive && previousId !== undefined) {
-        updateLayer(previousId, { id });
+        updateLayer(previousId, { id, ["return-period"]: returnPeriod });
+      }
+    },
+    [
+      selectedLayerId,
+      setSelectedLayerId,
+      isDatasetActive,
+      updateLayer,
+      layers,
+      layersConfiguration,
+    ],
+  );
+
+  const onChangeSelectedReturnPeriod = useCallback(
+    (stringReturnPeriod: string) => {
+      const returnPeriod = Number.parseInt(stringReturnPeriod);
+
+      setSelectedReturnPeriod(returnPeriod);
+
+      if (isDatasetActive && selectedLayerId !== undefined) {
+        updateLayer(selectedLayerId, { ["return-period"]: returnPeriod });
       }
     },
-    [selectedLayerId, setSelectedLayerId, isDatasetActive, updateLayer],
+    [selectedLayerId, setSelectedReturnPeriod, isDatasetActive, updateLayer],
   );
 
   return (
@@ -89,7 +115,7 @@ const DatasetCard = ({ id, name, defaultLayerId, layers }: DatasetCardProps) =>
           <Switch id={`${id}-toggle`} checked={isDatasetActive} onCheckedChange={onToggleDataset} />
         </div>
       </div>
-      <div className="mt-1">
+      <div className="mt-1 flex flex-col gap-1.5">
         <Select
           value={selectedLayerId !== undefined ? `${selectedLayerId}` : ""}
           onValueChange={onChangeSelectedLayer}
@@ -105,6 +131,23 @@ const DatasetCard = ({ id, name, defaultLayerId, layers }: DatasetCardProps) =>
             ))}
           </SelectContent>
         </Select>
+        {!!layerReturnPeriods && (
+          <Select
+            value={selectedReturnPeriod !== undefined ? `${selectedReturnPeriod}` : ""}
+            onValueChange={onChangeSelectedReturnPeriod}
+          >
+            <SelectTrigger aria-label="Return period">
+              <SelectValue placeholder="Select a return period" />
+            </SelectTrigger>
+            <SelectContent>
+              {layerReturnPeriods.options.map((option) => (
+                <SelectItem key={option} value={`${option}`}>
+                  {`${option}-year return period`}
+                </SelectItem>
+              ))}
+            </SelectContent>
+          </Select>
+        )}
       </div>
     </div>
   );
diff --git a/client/src/components/dataset-card/utils.ts b/client/src/components/dataset-card/utils.ts
new file mode 100644
index 0000000..2d4e0b3
--- /dev/null
+++ b/client/src/components/dataset-card/utils.ts
@@ -0,0 +1,76 @@
+import useMapLayers from "@/hooks/use-map-layers";
+import { DatasetLayersDataItem } from "@/types/generated/strapi.schemas";
+import { LayerParamsConfig } from "@/types/layer";
+
+export const getDefaultSelectedLayerId = (
+  defaultLayerId: number | undefined,
+  layers: DatasetLayersDataItem[],
+  layersConfiguration: ReturnType<typeof useMapLayers>[0],
+) => {
+  // The ids of the layers that belong to the dataset
+  const datasetLayerIds = layers.map(({ id }) => id!);
+  // The ids of the layers active on the map, probably not from this dataset
+  const activeLayerIds = layersConfiguration.map(({ id }) => id!);
+  // The id of the layer that belongs to the dataset and is active, if any
+  const activeDatasetLayerId = datasetLayerIds.find((id) => activeLayerIds.includes(id));
+
+  if (activeDatasetLayerId) {
+    return activeDatasetLayerId;
+  }
+
+  return defaultLayerId;
+};
+
+export const getDefaultReturnPeriod = (
+  layerId: number | undefined,
+  layers: DatasetLayersDataItem[],
+  layersConfiguration: ReturnType<typeof useMapLayers>[0],
+) => {
+  const layerConfiguration = layersConfiguration.find(({ id }) => id === layerId);
+
+  // If the layer is active and already has a selected return period, we return it
+  if (layerConfiguration?.["return-period"] !== undefined) {
+    return layerConfiguration["return-period"];
+  }
+
+  // Else we look for the default return period stored in `params_config`
+  const layer = layers.find(({ id }) => id === layerId);
+  const defaultReturnPeriod = (
+    layer?.attributes!.params_config as LayerParamsConfig | undefined
+  )?.find(({ key }) => key === "return-period");
+
+  if (
+    !defaultReturnPeriod ||
+    defaultReturnPeriod.default === undefined ||
+    defaultReturnPeriod.default === null
+  ) {
+    return undefined;
+  }
+
+  return defaultReturnPeriod.default as number;
+};
+
+export const getReturnPeriods = (layerId: number | undefined, layers: DatasetLayersDataItem[]) => {
+  const layer = layers.find(({ id }) => id === layerId);
+  if (!layer) {
+    return undefined;
+  }
+
+  const returnPeriod = (layer.attributes!.params_config as LayerParamsConfig | undefined)?.find(
+    ({ key }) => key === "return-period",
+  );
+  if (
+    !returnPeriod ||
+    returnPeriod.default === undefined ||
+    returnPeriod.default === null ||
+    returnPeriod.options === undefined ||
+    returnPeriod.options === null
+  ) {
+    return undefined;
+  }
+
+  return {
+    defaultOption: returnPeriod.default as number,
+    options: [...(returnPeriod.options as number[])].sort((a, b) => a - b),
+  };
+};
diff --git a/client/src/components/map/layer-manager/item.tsx b/client/src/components/map/layer-manager/item.tsx
index e89d81a..89daceb 100644
--- a/client/src/components/map/layer-manager/item.tsx
+++ b/client/src/components/map/layer-manager/item.tsx
@@ -17,7 +17,12 @@ const LayerManagerItem = ({ id, beforeId, settings }: LayerManagerItemProps) =>
   }
 
   return (
-    <Source {...config.source}>
+    <Source
+      // The key ensures that if the URL of the source changes, Mapbox will correctly detect the
+      // change
+      key={config.source.url}
+      {...config.source}
+    >
       {config.styles.map((style) => (
         <Layer key={style.id} {...style} beforeId={beforeId} />
       ))}
diff --git a/client/src/components/panels/flood/index.tsx b/client/src/components/panels/flood/index.tsx
index 42e891d..a51a1c3 100644
--- a/client/src/components/panels/flood/index.tsx
+++ b/client/src/components/panels/flood/index.tsx
@@ -3,7 +3,7 @@ import { Skeleton } from "@/components/ui/skeleton";
 import useDatasetsBySubTopic from "@/hooks/use-datasets-by-sub-topic";
 
 const FloodPanel = () => {
-  const { data, isLoading } = useDatasetsBySubTopic("flood");
+  const { data, isLoading } = useDatasetsBySubTopic("flood", ["name", "params_config"]);
 
   return (
     <div className="min-h-screen px-5 py-5 lg:min-h-0 lg:px-10">
diff --git a/client/src/hooks/use-layer-config.ts b/client/src/hooks/use-layer-config.ts
index 27090cc..9f104b2 100644
--- a/client/src/hooks/use-layer-config.ts
+++ b/client/src/hooks/use-layer-config.ts
@@ -44,6 +44,9 @@ const resolveLayerConfig = (
         setVisibility({ v }: { v: boolean }) {
           return v ? "visible" : "none";
         },
+        match({ input, outputs }: { input: unknown; outputs: [unknown, unknown][] }) {
+          return outputs.find(([value]) => input === value)?.[1];
+        },
       },
       enumerations: {
         params: resolvedParamsConfig,
diff --git a/client/src/hooks/use-map-layers.ts b/client/src/hooks/use-map-layers.ts
index c55cbb9..1d18480 100644
--- a/client/src/hooks/use-map-layers.ts
+++ b/client/src/hooks/use-map-layers.ts
@@ -8,6 +8,7 @@ const schema = z.object({
   id: z.number(),
   visibility: z.boolean(),
   opacity: z.number().min(0).max(1),
+  "return-period": z.number().int().optional(),
 });
 
 export default function useMapLayers() {
@@ -17,12 +18,13 @@ export default function useMapLayers() {
   );
 
   const addLayer = useCallback(
-    (id: number) => {
+    (id: number, attributes?: Partial<z.infer<typeof schema>>) => {
       setLayers((layers) => [
         {
           id,
           visibility: true,
           opacity: 1,
+          ...attributes,
         },
         ...layers,
       ]);
diff --git a/client/src/types/layer.ts b/client/src/types/layer.ts
index 69ab1b5..93635dd 100644
--- a/client/src/types/layer.ts
+++ b/client/src/types/layer.ts
@@ -3,6 +3,7 @@ import { AnyLayer, AnySource, SkyLayer } from "react-map-gl";
 export interface LayerSettings {
   visibility: boolean;
   opacity: number;
+  "return-period"?: number;
 }
 
 export interface LayerConfig {
@@ -13,6 +14,7 @@ export interface LayerConfig {
 export interface LayerParamsConfigValue {
   key: string;
   default: unknown;
+  options?: unknown[];
 }
 
 export type LayerParamsConfig = LayerParamsConfigValue[];