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Research Article

Flood susceptibility mapping leveraging open-source remote-sensing data and machine learning approaches in Nam Ngum River Basin (NNRB), Lao PDR

ORCID Icon, ORCID Icon, ORCID Icon & ORCID Icon
Article: 2357650 | Received 26 Feb 2024, Accepted 15 May 2024, Published online: 28 May 2024

Figures & data

Figure 1. The location of the Nam Ngum River Basin and photographs of flooded areas; (a,f) Thalat, (b) Tanpiao, (c) Thangon riverside, (d) Thangon, (e) Thasavang (Sources: a and f. photo credit: pilot bountem souphamixay, b. photo credit: pilot cap vanh mahayo, c. www.muan.sanook.com, d. www.vientianetimes.org.la, e. Photo credit: Ly vannaly).

Figure 1. The location of the Nam Ngum River Basin and photographs of flooded areas; (a,f) Thalat, (b) Tanpiao, (c) Thangon riverside, (d) Thangon, (e) Thasavang (Sources: a and f. photo credit: pilot bountem souphamixay, b. photo credit: pilot cap vanh mahayo, c. www.muan.sanook.com, d. www.vientianetimes.org.la, e. Photo credit: Ly vannaly).

Figure 2. The methodology involved in the flood susceptibility modeling.

Figure 2. The methodology involved in the flood susceptibility modeling.

Table 1. Description of Sentinel-1 data.

Table 2. Description of data used in the study.

Figure 3. Flood conditioning factors.

Figure 3. Flood conditioning factors.

Figure 4. Assessment of flood conditioning factors based on (a) Variance inflation factor, (b) Tolerance, (c) Pearson correlation, and (d) Information gain ratio.

Figure 4. Assessment of flood conditioning factors based on (a) Variance inflation factor, (b) Tolerance, (c) Pearson correlation, and (d) Information gain ratio.

Figure 5. AUROCs For all models, (a) random forest, (b) artificial neural network, (c) long short-term memory, and (d) support vector machine.

Figure 5. AUROCs For all models, (a) random forest, (b) artificial neural network, (c) long short-term memory, and (d) support vector machine.

Figure 6. Performance of the models: (a) confusion matrix; (b) MSE and RMSE, and (c) precision and accuracy assessment parameters.

Figure 6. Performance of the models: (a) confusion matrix; (b) MSE and RMSE, and (c) precision and accuracy assessment parameters.

Figure 7. Flood susceptible areas in percentage and sq. km obtained from support vector machine, random forest, artificial neural network, and long short-term memory.

Figure 7. Flood susceptible areas in percentage and sq. km obtained from support vector machine, random forest, artificial neural network, and long short-term memory.

Figure 8. Flood susceptibility maps generated from machine learning models.

Figure 8. Flood susceptibility maps generated from machine learning models.

Data availability statement

The data supporting this study’s findings are available on request from the authors.