This document provides an overview of watershed delineation using digital elevation models (DEMs) with ArcGIS. It discusses key steps in the hydrological modeling process including downloading and preprocessing DEMs, generating flow directions and accumulating flows, delineating sub-basins, and computing watershed parameters. The document also mentions data needs for hydrological modeling, including geographic data like lengths, areas, slopes and hydrological data like runoff coefficients, infiltration, and rainfall statistics.

1. ‫اﻟﺜﺎﻧﻲ‬ ‫اﻟﻠﻘﺎء‬

2. ‫اﻵن‬ ‫ﺣﺘﻰ‬ ‫ﻧﻌﺮﻓﻪ‬ ‫ﻣﺎ‬
Overview on WMS
Main simulation steps
Vocabulary
Register Image
Common coordinate systems in Egypt
Select and download DEM
Download WMS web data

3. ‫اﻟﻬﻴﺪروﻟﻮﺟﻴﺔ‬ ‫اﻟﺪراﺳﺔ‬ ‫ﻣﺮاﺣﻞ‬
Hydrological Model
Topographic dataDEM
Map
Web
Watershed Delineation
TOC
Soil
CN
Watershed characteristic
Length
Area
Slope
Rain
Estimated Flood

4. ‫اﻟﺮﻗﻤﻴﺔ‬ ‫اﻻرﺗﻔﺎﻋﺎت‬ ‫ﻧﻤﺎذج‬ ‫ﺑﺎﺳﺘﺨﺪام‬ ‫اﻷﺣﻮاض‬ ‫ﺗﺮﺳﻴﻢ‬
DEM

5. ‫اﻟـ‬ ‫ﻣﻠﻔﺎت‬ ‫ﻫﻲ‬ ‫ﻣﺎ‬DEM

6. 1 degree == 111 kilometers

8. Trim

9. ‫ﺗﻌﺮﻳﻔﺎت‬

Watershed Delineation

No Data & DEM Fill Command

Flow Directions

10. Flow direction, Accumulation, Basin

11. No Data & DEM Fill Command

12. DEM Fill

13. Watershed Delineation
Generate DEM
TOPAZ
Watershed Outlet
Sub-basins Outlet
Flow direction
Flow Accumulation

15. TOPAZ

17. Watershed Delineation
)1(
)2(
)1(

18. ‫اﻟﻔﺮﻋﻴﺔ‬ ‫اﻷﺣﻮاض‬

19. Watershed Delineation
DEM -> Stream Arcs

21. Watershed Delineation
DEM -> Delineate Basins Wizard

22. Watershed Delineation
Compute Basin Parameter

24. ‫ﻣﺠﺮي‬ ‫اﻗﺮب‬ ‫اﻟﻰ‬ ‫ﻧﻘﻄﺔ‬ ‫اي‬ ‫ﻣﻦ‬ ‫اﻟﻤﻴﺎه‬ ‫ﻣﺴﺎر‬ ‫ﻟﺘﺤﺪﻳﺪ‬
‫ﻣﺎﺋﻲ‬

27. 
‫اﻟـ‬ ‫ﻋﻠﻰ‬ ‫ﺗﻌﺪﻳﻼت‬ ‫ﻋﻤﻞ‬DEM

‫اﻟﻤﻴﺎه‬ ‫ﻣﺴﺎر‬ ‫ﺗﻐﻴﻴﺮ‬

28. 
‫اﻟـ‬ ‫ﻋﻠﻰ‬ ‫ﺗﻌﺪﻳﻼت‬ ‫ﻋﻤﻞ‬DEM

‫اﻷرض‬ ‫ﻣﻨﺴﻮب‬ ‫ﺗﻐﻴﻴﺮ‬

29. ‫ﻣﺎﺋﻲ‬ ‫ﻣﺠﺮى‬ ‫اﺿﺎﻓﺔ‬
Compute TOPAZ

34. ‫اﻟﻬﻴﺪروﻟﻮﺟﻴﺔ‬ ‫اﻟﻨﻤﺎذج‬ ‫ﺑﻴﺎﻧﺎت‬
‫ﺟﻐﺮاﻓﻴﺔ‬ ‫ﺑﻴﺎﻧﺎت‬
‫اﻟﺴﺮﻳﺎن‬ ‫ﻣﻘﺎﻃﻊ‬ ،‫اﻷﻃﻮال‬ ،‫اﻟﻤﺴﺎﺣﺎت‬ ،‫اﻟﻤﻴﻮل‬
‫ﻫﻴﺪروﻟﻮﺟﻴﺔ‬ ‫ﺑﻴﺎﻧﺎت‬
‫اﻟﺴﺮﻳﺎن‬ ‫ﻣﻌﺎﻣﻞ‬ ،‫اﻟﺘﺴﺮب‬ ،‫اﻷﻣﻄﺎر‬

35. ‫اﻟﻬﻴﺪروﻟﻮﺟﻴﺔ‬ ‫اﻟﻨﻤﺎذج‬ ‫ﺑﻴﺎﻧﺎت‬
: ‫اﻷﻣﻄﺎر‬
‫اﻟﺘﻮزﻳـــﻊ‬ + ‫ﻟﻠﻤﺤﻄﺎت‬ ‫اﻟﻤﻜﺎﻧـــﻲ‬ ‫اﻟﺘﻮزﻳـــﻊ‬ + (‫)ﻣـــﻢ‬ ‫ارﺗﻔﺎع‬
‫ﻟﻠﺒﻴﺎﻧﺎت‬ ‫اﻻﺣﺼﺎﺋﻲ‬
‫اﻟﻔﻮاﻗﺪ‬
‫اﻟﻤﻨﺤﻨﻰ‬ ‫رﻗﻢ‬SCS Curve Number (CN)

38. ‫ﺑﺎﻟﺘﻮﻓﯿﻖ‬