Studies on preferential flow and soil structure dynamics in Chinese paddy soils:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | German |
| Veröffentlicht: |
Cottbus
Brandenburgische Techn. Univ.
2008
|
| Schriftenreihe: | Cottbuser Schriften zu Bodenschutz und Rekultivierung
37 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XXVI, 155 S. Ill., graph. Darst. |
Internformat
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| 100 | 1 | |a Sander, Till |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Studies on preferential flow and soil structure dynamics in Chinese paddy soils |c Till Sander |
| 264 | 1 | |a Cottbus |b Brandenburgische Techn. Univ. |c 2008 | |
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| 490 | 1 | |a Cottbuser Schriften zu Bodenschutz und Rekultivierung |v 37 | |
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Datensatz im Suchindex
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|---|---|
| adam_text | Contents
vi
List of Figures
xiii
List of Tables
xiv
List of Symbols and Abbreviations
xv
Zusammenfassung xvii
Summary
xxii
1
Introduction
1
1.1
Chinese paddy soils
1
1.2
The problem of water requirements
2
1.3
Environmental harm by leaching of chemicals
4
1.4
Preferential flow
5
1.5
Preferential flow in Chinese paddy soils
6
1.6
Objectives of the thesis
10
2
Preferential flow patterns in paddy fields using a dye tracer
20
2.1
Introduction
21
2.2
Materials and Methods
22
2.3
Results
27
2.4
Discussion
28
2.5
Conclusions
35
3
Assessment of Chinese paddy-soil structure using x-ray computed tomog¬
raphy
40
3.1
Introduction
41
3.2
Material and Methods
42
3.3
Results
46
3.4
Discussion and Conclusions
58
4
Non-contact shrinkage curve determination for soil clods and aggregates
by
3D
optical scanning
66
4.1
Introduction
67
4.2
Materials and Methods
69
4.3
Results and Discussion
74
4.4
Conclusions
82
5
Preferential flow induced by earthworm burrows in a layered flood-irrigated
paddy soil: Measurements
86
5.1
Introduction
87
5.2
Materials and Methods
90
5.2.1
Field site
90
5.2.2
Spatial distribution of earthworm burrows
90
5.2.3
Boundary conditions and pressure heads at regular conditions
93
5.2.4
Infiltration rates and flow heterogeneities at distinct earthworm bur¬
rows (experiments a and b)
94
5.2.5
Infiltration rates and now heterogeneities without removal of the
cultivated horizon(experiment c)
96
5.3
Results and Discussion
100
5.3.1
Spatial distribution of earthworm burrows
100
5.3.2
Boundary conditions and pressure heads at regular conditions
101
5.3.3
Infiltration rates and flow heterogeneities at distinct earthworm bur¬
rows (a, b)
103
5.3.4
Infiltration rates and flow heterogeneities without removal of the
cultivated horizon (c)
105
5.4
Conclusions 111
6
Modeling of preferential flow induced by earthworms from in-situ measure¬
ments in a paddy soil
117
6.1
Introduction
118
6.2
Materials and methods
120
6.3
Results and discussion
124
6.4
Conclusions
132
7
Concluding remarks
137
8
Outlook
140
Appendices
141
A Surface cracks
142
A.I Introduction
142
A.
2
Material and methods
142
A.3 Results and discussion
144
В
Computer codes
148
|
| adam_txt |
Contents
vi
List of Figures
xiii
List of Tables
xiv
List of Symbols and Abbreviations
xv
Zusammenfassung xvii
Summary
xxii
1
Introduction
1
1.1
Chinese paddy soils
1
1.2
The problem of water requirements
2
1.3
Environmental harm by leaching of chemicals
4
1.4
Preferential flow
5
1.5
Preferential flow in Chinese paddy soils
6
1.6
Objectives of the thesis
10
2
Preferential flow patterns in paddy fields using a dye tracer
20
2.1
Introduction
21
2.2
Materials and Methods
22
2.3
Results
27
2.4
Discussion
28
2.5
Conclusions
35
3
Assessment of Chinese paddy-soil structure using x-ray computed tomog¬
raphy
40
3.1
Introduction
41
3.2
Material and Methods
42
3.3
Results
46
3.4
Discussion and Conclusions
58
4
Non-contact shrinkage curve determination for soil clods and aggregates
by
3D
optical scanning
66
4.1
Introduction
67
4.2
Materials and Methods
69
4.3
Results and Discussion
74
4.4
Conclusions
82
5
Preferential flow induced by earthworm burrows in a layered flood-irrigated
paddy soil: Measurements
86
5.1
Introduction
87
5.2
Materials and Methods
90
5.2.1
Field site
90
5.2.2
Spatial distribution of earthworm burrows
90
5.2.3
Boundary conditions and pressure heads at regular conditions
93
5.2.4
Infiltration rates and flow heterogeneities at distinct earthworm bur¬
rows (experiments a and b)
94
5.2.5
Infiltration rates and now heterogeneities without removal of the
cultivated horizon(experiment c)
96
5.3
Results and Discussion
100
5.3.1
Spatial distribution of earthworm burrows
100
5.3.2
Boundary conditions and pressure heads at regular conditions
101
5.3.3
Infiltration rates and flow heterogeneities at distinct earthworm bur¬
rows (a, b)
103
5.3.4
Infiltration rates and flow heterogeneities without removal of the
cultivated horizon (c)
105
5.4
Conclusions 111
6
Modeling of preferential flow induced by earthworms from in-situ measure¬
ments in a paddy soil
117
6.1
Introduction
118
6.2
Materials and methods
120
6.3
Results and discussion
124
6.4
Conclusions
132
7
Concluding remarks
137
8
Outlook
140
Appendices
141
A Surface cracks
142
A.I Introduction
142
A.
2
Material and methods
142
A.3 Results and discussion
144
В
Computer codes
148 |
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| author | Sander, Till |
| author_facet | Sander, Till |
| author_role | aut |
| author_sort | Sander, Till |
| author_variant | t s ts |
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| dewey-hundreds | 600 - Technology (Applied sciences) |
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| dewey-raw | 631.4320931 |
| dewey-search | 631.4320931 |
| dewey-sort | 3631.4320931 |
| dewey-tens | 630 - Agriculture and related technologies |
| discipline | Biologie Agrar-/Forst-/Ernährungs-/Haushaltswissenschaft / Gartenbau |
| discipline_str_mv | Biologie Agrar-/Forst-/Ernährungs-/Haushaltswissenschaft / Gartenbau |
| format | Thesis Book |
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| geographic | China (DE-588)4009937-4 gnd |
| geographic_facet | China |
| id | DE-604.BV035033863 |
| illustrated | Illustrated |
| index_date | 2024-07-02T21:50:50Z |
| indexdate | 2024-07-09T21:20:40Z |
| institution | BVB |
| language | German |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-016702797 |
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| physical | XXVI, 155 S. Ill., graph. Darst. |
| publishDate | 2008 |
| publishDateSearch | 2008 |
| publishDateSort | 2008 |
| publisher | Brandenburgische Techn. Univ. |
| record_format | marc |
| series | Cottbuser Schriften zu Bodenschutz und Rekultivierung |
| series2 | Cottbuser Schriften zu Bodenschutz und Rekultivierung |
| spelling | Sander, Till Verfasser aut Studies on preferential flow and soil structure dynamics in Chinese paddy soils Till Sander Cottbus Brandenburgische Techn. Univ. 2008 XXVI, 155 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Cottbuser Schriften zu Bodenschutz und Rekultivierung 37 Zugl.: Cottbus, Techn. Univ., Diss., 2008 Zsfassung in dt. und engl. Sprache Boden (DE-588)4007348-8 gnd rswk-swf Wasserreis (DE-588)4126929-9 gnd rswk-swf Reisanbau (DE-588)4129532-8 gnd rswk-swf China (DE-588)4009937-4 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content China (DE-588)4009937-4 g Reisanbau (DE-588)4129532-8 s Wasserreis (DE-588)4126929-9 s Boden (DE-588)4007348-8 s b DE-604 Cottbuser Schriften zu Bodenschutz und Rekultivierung 37 (DE-604)BV012263877 37 Digitalisierung UB Regensburg application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016702797&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Sander, Till Studies on preferential flow and soil structure dynamics in Chinese paddy soils Cottbuser Schriften zu Bodenschutz und Rekultivierung Boden (DE-588)4007348-8 gnd Wasserreis (DE-588)4126929-9 gnd Reisanbau (DE-588)4129532-8 gnd |
| subject_GND | (DE-588)4007348-8 (DE-588)4126929-9 (DE-588)4129532-8 (DE-588)4009937-4 (DE-588)4113937-9 |
| title | Studies on preferential flow and soil structure dynamics in Chinese paddy soils |
| title_auth | Studies on preferential flow and soil structure dynamics in Chinese paddy soils |
| title_exact_search | Studies on preferential flow and soil structure dynamics in Chinese paddy soils |
| title_exact_search_txtP | Studies on preferential flow and soil structure dynamics in Chinese paddy soils |
| title_full | Studies on preferential flow and soil structure dynamics in Chinese paddy soils Till Sander |
| title_fullStr | Studies on preferential flow and soil structure dynamics in Chinese paddy soils Till Sander |
| title_full_unstemmed | Studies on preferential flow and soil structure dynamics in Chinese paddy soils Till Sander |
| title_short | Studies on preferential flow and soil structure dynamics in Chinese paddy soils |
| title_sort | studies on preferential flow and soil structure dynamics in chinese paddy soils |
| topic | Boden (DE-588)4007348-8 gnd Wasserreis (DE-588)4126929-9 gnd Reisanbau (DE-588)4129532-8 gnd |
| topic_facet | Boden Wasserreis Reisanbau China Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016702797&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV012263877 |
| work_keys_str_mv | AT sandertill studiesonpreferentialflowandsoilstructuredynamicsinchinesepaddysoils |