Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method
Abstract
:1. Introduction
2. Materials and Methods
2.1. Data Collection for Monthly GALDIT Assessment
2.2. Modification of Original GALDIT Method
2.3. Study Area
3. Results
3.1. Static GALDIT Parameters
3.2. Dynamic GALDIT Parameters
3.2.1. Height of Groundwater Level above Sea Level (L)
3.2.2. Impact of the Existing Status of Seawater Intrusion (I)
3.2.3. Saturated Thickness of the Aquifer (T)
3.3. SWI Assessment of Study-Site Based on Monthly GALDIT Index
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | Weight | GALDIT Factor Variable Range | Importance Rating |
---|---|---|---|
Groundwater occurrence | 1 | Confined aquifer | 10 |
Unconfined aquifer | 7.5 | ||
Leaky confined aquifer | 5 | ||
Bounded aquifer | 2.5 | ||
Aquifer hydraulic conductivity (m/day) | 3 | >40 | 10 |
10–40 | 7.5 | ||
5–10 | 5 | ||
<5 | 2.5 | ||
Height of groundwater level above sea level (m) | 4 | <1.0 | 10 |
1.0–1.5 | 7.5 | ||
1.5–2.0 | 5 | ||
>2.0 | 2.5 | ||
Distance from shore (m) | 4 | <500 | 10 |
500–700 | 7.5 | ||
750–1000 | 5 | ||
>1000 | 2.5 | ||
Impact of existing status of seawater intrusion (μs/m) | 1 | >3000 | 10 |
2000–3000 | 7.5 | ||
1000–2000 | 5 | ||
<1000 | 2.5 | ||
Saturated thickness of aquifer (m) | 2 | >10 | 10 |
7.5–10 | 7.5 | ||
5–7.5 | 5 | ||
<5 | 2.5 |
Parameter | Modified Variable Range | Modified Importance Rating |
---|---|---|
Groundwater occurrence | Confined aquifer | 10 |
Unconfined aquifer | 7.5 | |
Leaky confined aquifer | 5 | |
Bounded aquifer | 2.5 | |
Aquifer hydraulic conductivity (m/day) | >40 | 10 |
34–40 | 9 | |
28–34 | 8 | |
22–28 | 7 | |
16–22 | 6 | |
10–16 | 5 | |
8–10 | 4 | |
6–8 | 3 | |
4–6 | 2 | |
<4 | 1 | |
Height of groundwater level above sea level (m) | <1.0 | 10 |
1.0–1.2 | 9 | |
1.2–1.4 | 8 | |
1.4–1.6 | 7 | |
1.6–1.8 | 6 | |
1.8–2.0 | 5 | |
2.0–2.2 | 4 | |
2.2–2.4 | 3 | |
2.4–2.6 | 2 | |
>2.6 | 1 | |
Distance from shore (m) | <500 | 10 |
500–600 | 9 | |
600–700 | 8 | |
700–800 | 7 | |
800–900 | 6 | |
900–1000 | 5 | |
1000–1100 | 4 | |
1100–1200 | 3 | |
1200–1300 | 2 | |
>1300 | 1 | |
Impact of existing status of seawater intrusion (μs/m) | >3000 | 10 |
2600–3000 | 9 | |
2200–2600 | 8 | |
1800–2200 | 7 | |
1400–1800 | 6 | |
1000–1400 | 5 | |
600–1000 | 4 | |
200–600 | 3 | |
<200 | 2 | |
- | 1 | |
Saturated thickness of aquifer (m) | >10 | 10 |
9–10 | 9 | |
8–9 | 8 | |
7–8 | 7 | |
6–7 | 6 | |
5–6 | 5 | |
4–5 | 4 | |
3–4 | 3 | |
2–3 | 2 | |
<2 | 1 |
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Kim, I.H.; Chung, I.-M.; Chang, S.W. Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method. Water 2021, 13, 1820. https://doi.org/10.3390/w13131820
Kim IH, Chung I-M, Chang SW. Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method. Water. 2021; 13(13):1820. https://doi.org/10.3390/w13131820
Chicago/Turabian StyleKim, Il Hwan, Il-Moon Chung, and Sun Woo Chang. 2021. "Development of Seawater Intrusion Vulnerability Assessment for Averaged Seasonality of Using Modified GALDIT Method" Water 13, no. 13: 1820. https://doi.org/10.3390/w13131820