Warning: unserialize(): Error at offset 37504 of 40927 bytes in /mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Cache/Controller/OutputController.php on line 71 Stockhausen I Erosion - AGROFOR
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Beregnungsversuch

Einige Versuche mit Stockosorb® -besonders im Freiland- warfen die Frage auf, mit welchen Mengen und in welchen Intervallen beregnet werden muß, um die maximale Quellung des in den Boden eingearbeiteten trockenen Absorbers mit möglichst wenig Wasserverlust zu erreichen. Daneben zeigte sich, daß der Einfluß auf bodenphysikalische Eigenschaften augenscheinlich die Versickerungsintensität des Beregnungswassers sowie die Erodierbarkeit der Böden verändert. Die Versuchsanordnung in diesem Versuch soll detaillierte Erkenntnisse über die Einflüsse auf die genannten Parameter liefern.
Um den natürlichen Niederschlagsverhältnissen möglichst nahe zu kommen, wurde ein Beregnungsturm konzipiert (Skizze rechts) und das Konzept schließlich in der Scheune der Familie Reinhold Will in Gießen-Lützellinden realisiert.
Es wurde ein ca. 10 Meter hohes Gerüst in der Scheune aufgebaut (oben).

Rechts: Blick von oben in den Turm auf den Beregnungsmesser.
Die Beregnungswanne...
... in die 2.500 Kapillaren eingeklebt sind, in denen jeweils ein Kupferdraht steckt, an denen sich die Tropfen bilden können. Um ein breites Tropfengrößenspektrum zu erzielen, prallen die Tropfen auf Netz (im Bild unten zu sehen).
Die Erosionswannen, mit denen u.a. die Wasserspeicherkapazität, die Erodierbarkeit und der Oberflächenabfluss bei verschiedenen Aufwandmengen Hydroabsorber und unterschiedlichen Neigungswinkeln der Gefäße untersucht wurde.
Eines der erstaunlichen Ergebnisse: Der Hydrobasorber reduziert den Oberflächenabfluss und damit die Menge des erodierten Bodenmaterials! (u.a. in: WEGENER, H.-R., ZEIGER, M. & WEGENER, O. (2002): Die Wirkung von Hydroabsorbern auf Aggregatbildung und Erodierbarkeit sandiger Böden. Posterbeitrag auf dem 114. VDLUFA-Kongress in Leipzig. 16. - 20.09.2002.)
Diese und weitere Ergebnisse finden Sie u.a. in unseren Publikationen!
Failed to start the session because headers have already been sent by "/mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Cache/Controller/OutputController.php" at line 71. (500 Whoops, looks like something went wrong.)

RuntimeException

HTTP 500 Whoops, looks like something went wrong.

Failed to start the session because headers have already been sent by "/mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Cache/Controller/OutputController.php" at line 71.

Exception

RuntimeException

in /mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/session/src/Storage/NativeStorage.php (line 454)
  1. if ($this->isActive()) {
  2. throw new \RuntimeException('Failed to start the session: already started by PHP.');
  3. }
  5. if (ini_get('session.use_cookies') && headers_sent($file, $line)) {
  6. throw new \RuntimeException(
  7. sprintf('Failed to start the session because headers have already been sent by "%s" at line %d.', $file, $line)
  8. );
  9. }
  11. if (!session_start()) {
NativeStorage->start() in /mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Session/Storage/JoomlaStorage.php (line 313)
  1. $this->setId($session_clean);
  2. $cookie->set($session_name, '', ['expires' => time() - 3600 ]);
  3. }
  4. }
  6. parent::start();
  8. // Try loading data from the session
  9. if (!empty($_SESSION['joomla'])) {
  10. $this->data = unserialize(base64_decode($_SESSION['joomla']));
  11. }
in /mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/session/src/Session.php -> start (line 396)
  1. {
  2. if ($this->isStarted()) {
  3. return;
  4. }
  6. $this->store->start();
  8. $this->setState(SessionState::ACTIVE);
  10. // Initialise the session
  11. $this->setCounter();
in /mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/session/src/Session.php -> start (line 327)
  1. * @since 1.0
  2. */
  3. public function has($name)
  4. {
  5. if (!$this->isActive()) {
  6. $this->start();
  7. }
  9. return $this->store->has($name);
  10. }
Session->has() in /mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Session/Session.php (line 194)
  2. $name = $args[2] . '.' . $name;
  3. }
  4. }
  6. if (parent::has($name)) {
  7. // Parent is used because of b/c, can be changed in Joomla 6
  8. return parent::get($name, $default);
  9. }
  11. /*
Session->get() in /mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Application/CMSApplication.php (line 611)
  1. */
  2. public function getMessageQueue($clear = false)
  3. {
  4. // For empty queue, if messages exists in the session, enqueue them.
  5. if (!\count($this->messageQueue)) {
  6. $sessionQueue = $this->getSession()->get('application.queue', []);
  8. if ($sessionQueue) {
  9. $this->messageQueue = $sessionQueue;
  10. $this->getSession()->set('application.queue', []);
  11. }
CMSApplication->getMessageQueue() in /mnt/web312/d2/29/547229/htdocs/cms/plugins/system/cache/src/Extension/Cache.php (line 238)
  2. // Boolean short–circuit evaluation means this returns fast false when $isSite is false.
  3. return $isSite
  4. && $isGET
  5. && $app->getIdentity()->guest
  6. && empty($app->getMessageQueue());
  7. }
  9. /**
  10. * Get the cache controller
  11. *
Cache->appStateSupportsCaching() in /mnt/web312/d2/29/547229/htdocs/cms/plugins/system/cache/src/Extension/Cache.php (line 382)
  1. *
  2. * @since 1.5
  3. */
  4. public function onAfterRespond(AfterRespondEvent $event): void
  5. {
  6. if (!$this->appStateSupportsCaching() || $this->getCacheController()->getCaching() === false) {
  7. return;
  8. }
  10. // Saves current page in cache.
  11. $this->getCacheController()->store($this->getApplication()->getBody(), $this->getCacheKey());
in /mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/event/src/Dispatcher.php -> onAfterRespond (line 454)
  1. foreach ($this->listeners[$event->getName()] as $listener) {
  2. if ($event->isStopped()) {
  3. return $event;
  4. }
  6. $listener($event);
  7. }
  8. }
  10. return $event;
  11. }
in /mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/application/src/AbstractApplication.php -> dispatch (line 99)
  1. $dispatcher = $this->getDispatcher();
  2. } catch (\UnexpectedValueException $exception) {
  3. return null;
  4. }
  6. return $dispatcher->dispatch($eventName, $event ?: new ApplicationEvent($eventName, $this));
  7. }
  9. /**
  10. * Method to run the application routines.
  11. *
AbstractApplication->dispatchEvent() in /mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Application/CMSApplication.php (line 347)
  2. // Send the application response.
  3. $this->respond();
  5. // Trigger the onAfterRespond event.
  6. $this->dispatchEvent(
  7. 'onAfterRespond',
  8. new AfterRespondEvent('onAfterRespond', ['subject' => $this])
  9. );
  10. }
CMSApplication->execute() in /mnt/web312/d2/29/547229/htdocs/cms/includes/app.php (line 58)
  2. // Set the application as global app
  3. \Joomla\CMS\Factory::$application = $app;
  5. // Execute the application.
  6. $app->execute();
require_once('/mnt/web312/d2/29/547229/htdocs/cms/includes/app.php') in /mnt/web312/d2/29/547229/htdocs/cms/index.php (line 51)
  1. // ... die
  2. die();
  3. }
  5. // Run the application - All executable code should be triggered through this file
  6. require_once __DIR__ . '/includes/app.php';

Stack Trace

RuntimeException 
RuntimeException:
Failed to start the session because headers have already been sent by "/mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Cache/Controller/OutputController.php" at line 71.

  at /mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/session/src/Storage/NativeStorage.php:454
  at Joomla\Session\Storage\NativeStorage->start()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Session/Storage/JoomlaStorage.php:313)
  at Joomla\CMS\Session\Storage\JoomlaStorage->start()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/session/src/Session.php:396)
  at Joomla\Session\Session->start()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/session/src/Session.php:327)
  at Joomla\Session\Session->has()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Session/Session.php:194)
  at Joomla\CMS\Session\Session->get()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Application/CMSApplication.php:611)
  at Joomla\CMS\Application\CMSApplication->getMessageQueue()
     (/mnt/web312/d2/29/547229/htdocs/cms/plugins/system/cache/src/Extension/Cache.php:238)
  at Joomla\Plugin\System\Cache\Extension\Cache->appStateSupportsCaching()
     (/mnt/web312/d2/29/547229/htdocs/cms/plugins/system/cache/src/Extension/Cache.php:382)
  at Joomla\Plugin\System\Cache\Extension\Cache->onAfterRespond()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/event/src/Dispatcher.php:454)
  at Joomla\Event\Dispatcher->dispatch()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/vendor/joomla/application/src/AbstractApplication.php:99)
  at Joomla\Application\AbstractApplication->dispatchEvent()
     (/mnt/web312/d2/29/547229/htdocs/cms/libraries/src/Application/CMSApplication.php:347)
  at Joomla\CMS\Application\CMSApplication->execute()
     (/mnt/web312/d2/29/547229/htdocs/cms/includes/app.php:58)
  at require_once('/mnt/web312/d2/29/547229/htdocs/cms/includes/app.php')
     (/mnt/web312/d2/29/547229/htdocs/cms/index.php:51)