" Η φύσις μηδέν μήτε ατελές ποιεί, μήτε μάτην'' (Αριστοτέλης, 384-322 π.χ.)
" Nature ......loves simplicity and unity" ( J. Kepler, 1571-1630 -Apologia)

- The Environmental State of Freshwater Resources in Greece (rivers and lakes)


https://www.academia.edu/keypass/cmc5cU52dWt1QkRyVjJhQXFlSDE1bStqZndSTlB2UDlGSkpxNm9BNVNOaz0tLXluQSsyZXNNOVJLWTQ2bW9FVWNkNHc9PQ==--051d82ea8f2abc999c18df11cbcf2ba99cf91631/t/ejdVy-PUtAuKT-mhV3p/resource/work/5004101/The_environmental_state_of_freshwater_resources_in_Greece_rivers_and_lakes?email_work_card=title


———-
Βαθυμετρία και Μορφολογία των Ελληνικών Φυσικών Λιμνών (δημοσίευση 2025)
tinw_a_2447173_sm2341.docx (24.71 kB

https://www.tandfonline.com/doi/full/10.1080/20442041.2024.2447173


Bathymetry and morphometric analysis of Greek natural lakes through a hybrid GIS-acoustic methodology

Triantafyllia-Maria Perivolioti, Antonios Apostolakis, Dimitrios Papadimos & Vasiliki Tsiaoussi

To cite this article: Triantafyllia-Maria Perivolioti, Antonios Apostolakis, Dimitrios Papadimos & Vasiliki Tsiaoussi (2025) Bathymetry and morphometric analysis of Greek natural lakes through a hybrid GIS-acoustic methodology, Inland Waters, 15:1, 2447173, DOI: 10.1080/20442041.2024.2447173

To link to this article: https://doi.org/10.1080/20442041.2024.2447173


ABSTRACT

Homogeneous and up-to-date bathymetric information on lakes is essential to improve limnological knowledge and produce evidence-based lake monitoring, assessment methods, and river basin management plans according to Water Framework Directive (WFD). The present study focused on the production of updated bathymetric information on the main natural Greek lakes and their morphometric analysis. The aim was to address the knowledge gap by providing updated homogeneous and accurate bathymetric information for the main freshwater natural lakes of Greece as part of the National Monitoring Network of Lakes in the context of WFD. We surveyed 14 freshwater lakes in mainland Greece using a dual frequency echosounder. Using the acoustic data collected during the surveys, bathymetric digital terrain models (DTMs) were produced for each lake and used to estimate morphometric characteristics (mean/maximum depth, volume, lake depth ratio, volume development, mean lake diameter, relative depth ratio, shoreline development factor, hypsographic curve). This analysis demonstrated the potential of the morphometric approach to generate valuable information using up-to-date bathymetric DTMs. The geospatial data derived by the present study are available through an online repository, the Greek National Monitoring Network of Lakes (http://ekbygis.biodiversity-info.gr/geoserver/web/). These data provide a valuable database for the advancement of limnological knowledge, the implementation of comprehensive monitoring programmes, and informed decision making in water resources management

Supplementery materials

Supplementary Table 1. Sonar bathymetry accuracy assessment across 14 natural lakes, showing key parameters influencing measurement precision. For lakes surveyed on multiple dates, the highest error budget is presented.

Lake Name

Temperature (oC)

Sound Velocity (c) (m/s)

Error Component σzc

Minimum Vertical Resolution dzres

Error component σzm

Total Error Budget

Maximum Allowable Vertical Uncertainty

TVUMAX (Mean Depth)

Average

Standard Deviation

Average

Average

Average

Average

Average

Order 1

Order 2

Amvrakia

16.63

3.45

1471.33

0.6627

0.1471

0.013274

0.230

0.597

1.15

Cheimaditida

19.65

1.90

1481.10

0.0158

0.1448

0.000008

0.011

0.500

1

Kastoria

25.51

1.02

1498.06

0.0169

0.1497

0.000117

0.011

0.502

1.003

Lysimachia

23.8

1.15

1493.39

0.0196

0.1493

0.000097

0.011

0.502

1.003

Mikri Prespa

26.13

1.31

1499.70

0.0249

0.1500

0.000148

0.012

0.503

1.005

Ozeros

19.6

0.43

1480.95

0.0105

0.1481

0.000060

0.011

0.505

1.004

Pamvotida

24.57

0.93

1495.52

0.0253

0.1495

0.000122

0.012

0.505

1.007

Paralimni

12.9

0.43

1458.31

0.0202

0.1458

0.000447

0.011

0.504

1.006

Petron

22.53

0.06

1489.77

0.0007

0.1482

0.000014

0.011

0.501

1.006

Trichonida

20.35

4.98

1483.27

0.9116

0.1481

0.003973

0.427

0.621

1.001

Vegoritida

10.1

2.80

1447.83

0.7305

0.1472

0.007403

0.277

0.601

1.196

Volvi

25.35

2.49

1497.64

0.1487

0.1490

0.000768

0.022

0.516

1.163

Voulkaria

16.73

0.058

1471.67

0.0008

0.1498

0.000024

0.011

0.501

1.001

Zazari

5.4

0.17

1428.88

0.0098

0.1429

0.001161

0.010

0.503

1.005

Supplementary Table 2. Main geometric parameters (Water Level, Perimeter, Area, Volume) for all studied lakes. All data presented in the table correspond to the period in which acoustic surveys were performed in each lake.

Lake

Water Level

(m)

Perimeter

(km)

Area

(km2)

Volume

(m3 · 106)

Amvrakia

15.83

16.56

10.11

254.65

Cheimaditida

591.80

16.17

10.90

13.88

Kastoria

627.05

36.18

31.89

111.42

Lysimachia

15.27

17.75

10.57

34.22

Mikri

  Prespa

849.71

57.29

49.97

206.79

Ozeros

24.15

14.74

10.48

38.911

Pamvotida

469.04

23.18

21.92

118.74

Paralimni

37.03

18.49

10.72

55.57

Petron

572.38

14.80

11.97

23.55

Trichonida

16.01

56.94

94.18

2721.41

Vegoritida

518.06

48.02

47.15

1201.46

Volvi

35.65

55.64

71.23

885.73

Voulkaria

1.67

17.48

15.69

28.00

Zazari

599.33

6.24

1.93

8.99

 


Supplementary Table 3. Bottom elevations and characteristic depths for all studied lakes. All data presented in the table correspond to the period in which acoustic surveys were performed in each lake.

Lake

Minimum Bottom Elevation

(m)

Maximum Depth

(m)

Mean Lake Depth

(m)

Amvrakia

-33.67

49.50

25.18

Cheimaditida

587.52

4.29

1.27

Kastoria

616.96

10.09

3.49

Lysimachia

8.50

6.77

3.24

Mikri Prespa

841.69

8.25

4.14

Ozeros

18.04

7.11

3.71

Pamvotida

460.01

9.04

5.42

Paralimni

28.49

8.654

5.18

Petron

569.44

2.94

1.96

Trichonida

-36.13

52.14

28.9

Vegoritida

466.03

52.03

25.48

Volvi

9.06

26.59

12.43

Voulkaria

-2.46

4.14

1.78

Zazari

591.92

7.42

4.65

Supplementary Table 4. Form/Shape approximation metrics for all studied lakes. All data presented in the table correspond to the period in which acoustic surveys were performed in each lake.

Lake

Development Volume

(m)

Mean Lake Diameter

(m)

Relative Depth Ratio

(m)

Amvrakia

1.52

3588.61

1.38

Cheimaditida

0.89

3725.90

0.11

Kastoria

1.04

6371.75

0.16

Lysimachia

1.43

3668.59

0.18

Mikri Prespa

1.51

7976.83

0.10

Ozeros

1.61

3654.14

0.18

Pamvotida

1.79

5282.56

0.17

Paralimni

1.81

3695.38

0.23

Petron

2.00

3904.24

0.08

Trichonida

1.66

10950.20

0.47

Vegoritida

1.47

7748.35

0.67

Volvi

1.40

9523.58

0.28

Voulkaria

1.29

4469.77

0.09

Zazari

1.88

1569.47

0.47


Supplementary Table 5. Slope distribution of all studied lakes.

Lake

Minimum

Maximum

Mean Value

Standard Deviation

Amvrakia

0.001°

10.859°

1.860°

1.730°

Cheimaditida

0°

1.658°

0.203°

0.217°

Kastoria

0°

18.300°

0.470°

1.090°

Lysimachia

0°

4.240°

0.443°

0.521°

Mikri Prespa

0°

29.68°

0.389°

0.689°

Ozeros

0°

3.093°

0.325°

0.375°

Pamvotida

0°

4.227°

0.385°

0.466°

Paralimni

0°

28.837°

0.753°

1.121°

Petron

0°

3.549°

0.213°

0.286°

Trichonida

0°

5.696°

0.950°

0.867°

Vegoritida

0°

41.258°

1.381°

2.078°

Volvi

0°

4.152°

0.637°

0.743°

Voulkaria

0°

3.072°

0.295°

0.380°

Zazari

0°

19.411°

1.043°

1.450°


Supplementary Table 6. Comparison of the main calculated morphometric parameters (Area, Shoreline length, Elevation, Total Volume, Average Depth) of the studied Greek Lakes with the HydroLakes dataset (accessed on 27/11/2024, available  by Massager et al. (2016) and Khazaei et al. (2022).

Lake

Area (km2)

Shoreline Length (km)

Elevation (m)

Total Volume

(m3 · 106)

Average Depth (m)

 

Hydrolakes Dataset

Calculated Area

Hydrolakes Dataset

Calculated Perimeter

Hydrolakes Dataset

Measured Water Level

Hydrolakes Dataset

Calculated Total Volume

Hydrolakes Dataset

Measured Average Depth

Amvrakia

12.1

10.11

25.79

16.56

14

15.83

271.60

254.65

22.4

25.18

Cheimaditida

1.49

10.90

10.77

16.17

589

591.80

6.96

13.88

4.7

1.27

Kastoria

28.03

31.89

32.85

36.18

623

627.05

558.28

111.42

19.9

3.49

Lysimachia

9.79

10.57

18.29

17.75

11

15.27

29.03

34.22

3

3.24

Mikri Prespa

37.75

49.97

44.59

57.29

846

849.71

945.76

206.79

25.1

4.14

Ozeros

9.03

10.48

12.87

14.74

20

24.15

178.43

38.911

19.8

3.71

Pamvotida

19.43

21.92

24.83

23.18

464

469.04

260.00

118.74

13.4

5.42

Paralimni

7.56

10.72

16.51

18.49

32

37.03

114.49

55.57

15.1

5.18

Petron

9.33

11.97

13.04

14.80

568

572.38

89.33

23.55

9.6

1.96

Trichonida

91.88

94.18

51.06

56.94

11

16.01

2177.59

2721.41

23.7

28.9

Vegoritida

39.00

47.15

33.71

48.02

509

518.06

1184.54

1201.46

30.4

25.48

Volvi

62.50

71.23

53.45

55.64

30

35.65

642.42

885.73

9.9

12.43

Voulkaria

8.61

15.69

14.02

17.48

-7

1.67

39.39

28.00

4.6

1.78

Zazari

1.55

1.93

5.33

6.24

597

599.33

10.25

8.99

 

6.6

4.65